Hammer Bro:
To beat this dude, level up to 3 and challenge him, using Jump and Fire Orb. When you win, you will get a Hammer.

Croco:

Mario: Unarmed, Shirt, Jump Shoes
Mallow: Unarmed, Pants, Accessory

Beat Croco by using Marios Fire Orb. Make sure you are at least level 4 and have at least 5 Honey Syrups. Keep using fire orb and Croco will give up.

Mack:

Mario: Hammer, Shirt, Wake-Up-Pin
Mallow: Unarmed, Pants, Antidote Pin

To win against mack, Use Thunderbolt and Super Jump. Mack doesnt do well with marios Hammer Either.
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Belome:

Mario: Hammer, Shirt, Trueform Pin
Mallow: Unarmed, Pants, Wake-Up-Pin

At level 6 you are ready to take on Belome. He will use Scarecrow, Sleep and Tounge attacks. Use marios hammer and Mallows Thunderbolt.

Bowyer:

Mario: Noknok Shell, Thick Shirt, Fearless Pin
Mallow: Froggie Stick, Thick pants. Wake-Up-Pin
Geno

At level 8, You are good to go against Bowyer. Use regular Attacks or Marios Super Jump.

croco:

Mario: Punch Glove, Work Pants, Fearless Pin
Mallow: Cymbals, Work Pants, Fearless Pin
Geno: Finger Shot, Work pants, Fearless Pin

Croco is toast at level 9. this time he will steal you items. Keep it going with HP Rain, but mix in regular attacks.

Punchinello:

(see croco)

Punchinello is best dealt with with regular attacks At level 10. Use mallows thunderbolt on the sets of bombs. in the end, He will kill himself with the King Bomb.

Booster:

Mario: masher, Work Pants, Accessory
Bowser: Chomp, Work pants, Fearless Pin
Mallow: Cymbals, Work Pants, Wake-up-Pin

Booster is easy. Use a bomb on the Snifits and regular attacks on Booster.

Knife Guy and Grate Guy:

(See booster)

Use Super Flame on knife Guy and Shocker against Grate Guy to bust up these guys. Bowser should attack with his chomp and all Fright Bombs you may have.

Bundt and Raspberry:

Mario: Masher, happy Shirt, Wake-up-Pin
Bowser; Chomp, Happy Shell, Fearless Pin
Geno: Hand Gun, Happy Cape, Trueform Pin

When you are at level 12, facing this cake will turn out to be its just desserts. First Focus on the cake. Use regular Attacks until it starts moving. this part is a pain in the kiester. Use Regular attacks and a crystalline to blow out the candles. When they are all gone, hit it one more time to kill it. Use jump attacks on Raspberry to win the match and Princess Toadstool!

King Calamari:

Mario: Masher, Sailor Shirt, Amulet
Bowser: Hurly Gloves, Work Pants, Trueform Pin
Princess: Slap Glove, Nauticadress, B'tub Ring

King Calimari is not all that hard if you are at level 13. Use Regular attacks on the left and right tentacles. use Fire and Ice bombs (you DID stock up well in Seaside town, didnt you?) against the king. When you are all out, it's best to press on with regular attacks.

Johnathan Jones:

Mario: Masher, Sailor Shirt, Amulet
Geno: Hand Gun, Sailor Cape, Zoom Shoes
Princess: unarmed, Nauticadress, Saftey Badge

This is the boss of sunken ship, and you should be at level 14 when fighting him. Use Toadstools group hug to heal the troops, and use Marios Super Flame to cook the fish. if the sharks are dead, you will go One on One. Keep using Super Flame and use RED ESSENCES! YES! I just used it in my last game and it worked wonders.

Yairdovich:

Mario: Masher, Sailor Shirt, Saftey Badge
Mallow: Whomp Glove, Work Pants, Amulet
Princess: Unarmed, Nauticadress, Saftey Ring

The HARDEST single boss in the game. I battled this dude at level 14 once, and it was hard. I consider raising to level 16. Mallow is good here for two reasons. For one, his Shocker is great against the guy and he can find out who is the right yairdovich. If it says My promotions At Stake, Attack him! Attack the other if it says Im not the real McCoy.

Belome is Bak

Mario: Troopa Shell, Sailor Shirt, Exp. Booster
Mallow: Ribbit Stick, Sailor Pants, Scrooge Ring
Princess: Parasol, Nauticadress, Wake-Up-Pin

this dude is harder than the last. The Scrooge ring is Needed, because you'll be using lots of Special Attacks. At level 18, bare at him with regular attacks and Thunderbolt. Shocker is also great, and use princess for healing.

Megasmilax:

Mario: Troopa Shell, Sailor Shirt, Scrooge Ring
Bowser: Spiked Link, Courage Shell, jinx Belt
Princess: Parasol, Super Suit or Nauticadress, Treform pin

go at the Plant man at level 19. Use regular attacks on the little sprouts, then go after Megasmilax. Later after facing him, he will use an attack that will send you transforming into mushrooms!?! Use princesses Group Hug and continue attacking.

Jinx 1,2, and 3

Mario: Troopa Shell, Sailor Shirt, Saftey Badge
Bowser: Spiked Link, Courage Shell, Troopa pin
Princess: Parasol, Super Suit, Scrooge Ring

Face Mr. Chan with regular attacks. He will use some seriously bloody attacks, like Silver Bullet and Bombs Away!. i reccomend leveling at 22 before you take him on a third time.

Birdo:

Mario: Mega Glove, Super Suit, Troopa pin
Bowser: Spiked link, Fuzzy Shell, Feather
Princess: War Fan, Fuzzy Dress, Rare Scarf

Birdo fires hot eggs! Her attack rating is high, so don some great armor. Use defense mode to dodge the eggs. When they bounce off you, they will turn into Shellberts! Attack 'em and it will dish out 80 points to Big Bird.

Valentina and Dodo:

Mario: Mega Glove, Fuzzy Shirt, Jump Scarf
Bowser: Spiked link, Super Suit, Rare Scarf
Princess: War Fan, Fuzzy Dress, Feather

This time, you need to focus on bowser for protection. Attack dodo good and he will run back to Valentina. Attack her with Regular Attacks. she will soon fly the coop. Be sure you're at level 21.

Czar Dragon:

Mario: Lazy Shell, Super Suit, Saftey Badge
Bowser: Spiked Link, Fire Shell, Jinx Belt
Mallow: Sticky Glove, Fire Pants, Rare Scarf

the Dragon man uses fire attacks (duh stupid), but his big suprise is Water Blast (gotta be hot water...). Use regular attacks and Thunderbolt against Helio. Snowy is also good, as well is Star Rain. If youre at level 22, you are eligible of beating him. Use Ultra Jump against Zombone.

Axem Rangers:

Mario: Lazy Shell, Super Suit, Saftey Badge
Bowser: Spiked Link, Fire Shell, Jinx Belt
Mallow: Unarmed, Lazy Shell, Rare Scarf

This battle is EXTREMELY HARD, so hard that you gotta be at level 24 if you want a chance. Use Regular atacks on the Rangers in this order: Black, pink, Green, Red, Yellow. the core will appear if you beat em all. it throws out a breaker beam, which causes loads of damage. Use Shocker against the core. Use Red Essense on Mario. Since you don't have princess in the bout, carry lots of Mid Mushrooms and Kerokero Colas. Good Luck!

Magikoopa:

Mario: Lazy Shell, Super Suit, Saftey Badge
Mallow: Sonic Cymbals, Fire Pants, Jinx Belt
Geno: Hand Cannon, Fire Cape, Rare Scarf

this is the easiest boss in Smithy Factory. He will throw out Bahamutt, Jinx Clones and King Bombs, but you can pass them. If you are at level 25, you can win in no time.

Boomer:

Mario: Lazy Shell, Super Suit, Saftey Badge
Geno: Star Gun, Star Cape, Jinx Belt
Princess: Frying pan, Lazy Shell, Rare Scarf

Boomer juggers out fast moves, so rev up Geno. Regular attacks are always good, as so is special attacks. At level 26 you are born to win. But be careful- Smithy has taken note. This is the last easy boss in the game.

Exor the Sword:

(See boomer)

You will be automatically thrown into the battle after beating Boomer. Use all Red Essences and Bombs you have against him. Beat an eye first, then beat Exor. If you beat two eyes and a mouth, he will be even more weak. If you want it done quick, use geno Whirl 0n Exor when you beant an eye.

Culex:

Mario: Lazy Shell, Super Suit, Saftey Badge
Bowser: Drill Claw, Heal Shell, jinx Belt
Princess: Frying pan, Lazy Shell, Rare Scarf

Culex is the HARDEST BOSS IN THE GAME! Use Rock Candy and all avaliable bombs and star eggs you have, then use regular attacks. after 4096 HP, Culex will give up. Later, His Crystals will give up too, even if you haven't killed them!!!

Tour of the factory:

Mario: Lazy Shell, Super Suit, Saftey Badge
Bowser: Drill Claw, Heal Shell, Quartz Charm
Princess: Frying Pan, Lazy Shell, Rare Scarf or Geno: Unarmed, Lazy Shell, Rare Scarf

The rest of the enemies listed will be easily dealt with with the shown team. If you are worried you wont have enough max Mushrooms for the fight, Go with Princess. If you are okay with your HP Replenishing items, Go with Geno.

Countdown:

Battle Countdown with regular attacks and use Jump attacks against the bells. It will use Fear Roulette. Pray it will land on bowser, because it will kill instantly!

Domino and Cloaker:

These Jesters want to play around with your life! Use Regular attacks on domino. He will get killed and Cloaker will resort to Earthlink the snake. Hit the Viper with regular attacks to beat it.

Smithy:

Here it is, the last challenge! He has more HP than anyone in the game, but he is not the hardest boss. First, Use Geno Boosts if you have Geno. Use Regular attacks on Smithy and use "Everyone attacks" when it gets crowded with Shypers.
He will transform to a new being when you beat him. Regular attacks are the key. Good luck!

New Forms of Smithy:

Blockhead: You will only see this nerd when Smithy just transforms. His attack and Defense are quite average.

Shield: His defense is high and he uses recover and shredder to boot. He will soon change! Dont worry!

Wizard: His defense is way low. Use attacks hard and fast!

Tank: He shoots bullets! (duh.) His attack is high and his defense is pretty up there.

Treasure: He will open his head to reveal an all-efect status attack!