To be honest, Inferno really needs to be seen and/or heard to be fully appreciated, he's more physical than The Brain or Sideshow Bob, but here are a few good quotes anyway. For complete quotes, check out the episode guides.
"Spiders - dare invade the colony! Inferno, Terrorize!"
"Destruction to all who threaten us - the Royalty demands it!"
"Another invader coomes from the air - it will burn."
"No, only the royalty rules. As soldier, I defend the colony.
"Praise the royalty - I found it!"
(After Tigatron blows away the stasis pod) "The colony! Whoever has done this thing will BURN. Inferno, terrorize!"
"I will destroy you and all your kind!"
"Defend the colony...defend the colony...defend the colony...defend the colony...defend the colony...defend the colony..."
"Hiyaaaaaa - For the Royalty!"
"You're food for the colony, Maximals!"
"Attack!"
"The Royalty commands your wreckage! Destroyer of my colony!"
"So the Tiger no longer wishes to fight - (signalling on a radio) - Terrorsaur, Waspinator, regroup on my coordinates."
"The Royalty commanded we capture the Maximals invading our colony! Will you explain our failure to him?!"
(Speaking to Terrorsaur and Waspinator, about Optimus) "Excellent! He'll have no chance against the three of us!"
"For the Royalty!" (he really likes that one, doesn't he?)
"Attack" (this one too.)
(Spying on Black Arachnia and Tarantulas) "The Royalty was right - Spiders spin their own web of intrigue."
"The Royalty will be interested to know what you spiders are up to!"
"Inferno to Megatron!"
(To Tarantulas) "You're no match for me! Burn, traitor, burn!">
(To Black Arachnia) "So, you're still functional. I'll soon remedy that mistake!"
"Uuhh...I must return to the Royalty at once!"
(To Dinobot)"Ha ha! If it's batle you want, let it begin!"
"Hyaaa - for the glory of the Royalty!"
(To Dinobot)"I don't need a weapon to destroy you, traitor!"
(To Megatron)"Royalty! You've come for me!"
"For the Royalty!"
"Waa-hahahaha! Fool! Pain is my friend! allow me to introduce you to it!"
(About to fight Silverbolt) "Oh look! A hero! My favourite!"
INFERNO: "Insolent worms-burn in the fires of Inferno!" (I'm not sure about the "worms" part)
"Your turn to burn, Optimus Primal!"
(To Megatron) "And how may I serve you, Royalty?"
INFERNO: "As you command my Queen!"
MEGATRON: "Oh, I do wish he'd quit calling me that."
(Knocking over the relay station he spent the whole day building) "Haa ha ha ha hahahahaha!"
(Spotting Dinobot and Rattrap) "A traitor and a rat!"
"Terrorize!" (I know this quote sucks...but I'm going for completeness. Besides, it always sounds really cools when Inferno says it...the way he rolls those Rs!)
(To Dinobot) "Stand your ground, traitor!"
"You have served the royalty well, Waspinator!"
(To Waspinator) "I will bring the traitor to the royalty. You bring the Fuzor."
(To Quickstrike, who's steamed about getting his butt kicked by Rattrap) "Never mind the rat: We have bigger prizes to take to the Royalty. Back to the nest!"
(Dinobot has just defeated Quickstrike in a Predacon challenge)
MEGATRON: "Inferno, aid Quickstrike."
INFERNO: "Yes, my Queen."
DINOBOT (To MEGA): "I was not aware you had given yourself a new title!"
MEGA: "The ant has some...faulty programming."
(To Black Arachnia) "The Royalty asked you a question, answer!"
INFERNO: "Say the word, my queen and he (Tarantulas) will burn!"
MEGATRN: "Not yet. And for the last time, STOP CALLING ME THAT!"
INFERNO: "As you cammand my-grunt!" (Megatron slugs him)
"Royalty, Waspinator and Quickstrike report a Maximal attack on jamming station three. Do I reinforce them?"
"I don't Rock and Roll, I burn!" (Gotta love those one-line catch phrases :)
(Blasting Rhinox at point-blank) "Goodbye! Ha ha ha ha ha hahahahahahahaha!!"
(Telling Black Arachnia not to touch the disc) "But the Royalty said we we're not to touch it until he..." (he's broken off as Rhinox gets even for being shot point-blank.)
"Every job for the royalty is a gift!"
"Royalty, Maximals attacking!"
(Speaking about Silverbolt and Black Arachnia) "Ugghh! They-they laugh together!"
(Megatron calls Inferno) "Yes Royalty!"
(Megatron tells Inferno about the crashed stasis pod) "Then you will have it. For the glory of the colony!"
"I will retrieve it (stasis pod) before the others come - then I will again stand at the Royalty's side!"
"Something is happening!"
(To Silverbolt, speaking about the stasis pod): "You will be too busy burning to save it!"
"That creature is the property of the Royalty!"
(To Rampage) "Stand aside, I will bring this prize to the royalty!"
(After being ordered to transform by Megatron) "As you command - beast mode!"
(To Rampage and Transmutate) "Speak up! I won't have you freaks plotting behind the royalty's back."
INFERNO (to Rampage): "Loyalty comes first. Where are we going?"
RAMPAGE: "To let the Maximals find us."
INFERNO: "I see...WHAT!?!"
(Talking to Transmutate, about Silverbolt) "We'll keep the head for the Royalty, destroy the rest."
"Bah, the Royalty was right - it (Transmutate) is useless!"
(To Megatron) "Our interrupted attack on the valley caused several tribes (of humans) to scatter...it will be impossible to find them again!"
MEGATRON: "There is only one option left to me."
INFERNO: "That is?"
MEGATRON: "Gamble - and hope the dice roll in my favour."
(Fighting Ravage's cloaked ship) "Royalty, I cannot see a target!"
"Activating scanners now, royalty."
"By Royal command!"
"For...the...Royalty!"
"Woah-huh-mnnnhh..."
(Replying to a radio transmission from Megatron) "Coming, my Queen!"
"I will protect you royalty!" (from Optimus Primal, that is)
(Radioing Megatron) "Inferno to the Royalty, we are in the position."
(To Rampage) "Just follow my orders, drone!"
"Rampage, prepare to fire!" (At which point he jumps out and "ambushes" the Maximals, only to realize that Rampage is gone!)
"What is your command Royalty?"
"Yes, Royalty!"
"Give me Sentinal or burn, Maximal!"
"No tricks, or I will fire."
"Stand and fight, vermin!"
"Sentinal is ours! The Royalty will be pleased!"
"For the Royalty!"
"Royalty, the Maximals are approaching!"
"Pooh! Your pitiful potshots are no match for me!"
"The traitoress can now be destroyed, Royalty...and the cat as well!"
INFERNO (After Megatron sends Quickstrike to the attack): "Royalty, why was I not chosen?"
MEGATRON: "Because Inferno, when expecting booby traps - always
send a boob in first." (Quickstrike gets smashed senseless by a giant
fist)
"Ha ha! Let the traitor be destroyed!"
(To Optimus): "You power is useless against the Royalty, fool!"
MEGATRON: "Inferno, guard our guests."
INFERNO: "As you command, Royalty!"
(As Black Arachnia runs away): "She is escaping!" (he chases her, then she locks him outside): "Let me in!" (finally, BA turns on the auto-guns, and just before he gets scrapped, Inferno groans, "No!"
"What of the traitor, Royalty?"
(As something streaks towards the Predacon base, "Royalty, it will destroy the colony!"
"The colony!"
INFERNO (Talking to Rampage): "The Royalty will triumph! All we need
is a new colony, and I shall find it!"
WASPINATOR: "Hah! Ant-bot not find own thorax with both hands and
a road-map."
INFERNO: "Wah!" (knocks Waspinator out of the tree they were in.)
(To Megatron) "At once my Queen!"
(Inferno, Quickstrike, and Waspinator are spying on the humans)
INFENRO: "There! That will be our new colony!"
QUICKSTRIKE: "Eeew, I don't want to move in there, it's got all
them hairy critters in it! Unless...unless you mean, we's gonna
slag 'em! Oh pleeease tell me that's what you're planning!"
INFENRO: "The Royalty demands a new colony, and we shall take it.
By force!"
QUICKSTRIKE: "Yahoo, now you're talking!"
(Waspinator refuses to fight the humans) "But the Royalty commands!"
"For the glory of the Royalty!"
"The Royalty wil be pleased. The new colony is ours!"
"The Royalty - My Queen! We are down here!"
(Just as he finally realizes that Megatron is going to shoot the village) "Noooo!"