"Soldier of the Turtle Empire, his orders are to find and destroy Mario. Jump on him and he stops moving for a while." -Super Mario Bros. Instruction Manual (Green type)

"This turtle is chicken! Very timid, he gets scared easily and runs back and forth a lot. Jump on him and he stops moving for a while." - SMB Instruction Manual (Red type)

"These brainless sentries pace back and forth in a given patrol sector." - SMB3 Strategy Guide (Red type)

"Ferocious attacking Koopas that charge at Mario in a straight line." -SMB3 Strategy Guide (Green type)

"The same old Koopas are back again. Everything seems bleak when these characters appear! If you jump on a Koopa in this game, it pops out of its shell. And what's worse is that an unshelled Koopa will eventually find its empty shell and climb back in to start all over again. BEWARE! If a Koopa climbs into a yellow shell, he'll become invincible!." - SMW Instructions

"These fighting turtles first appeared in Mario Bros. as Shell-creepers, then became Koopa Troopas and Koopa Paratroopas in the Super Mario Bros. series. Recently Mario has been able to knock them out of their shells. Before, they hid in their housings when stomped, then came back out when the coast was clear." -Mario Mania

"Mario's most famous foe, Koopa Troopa, comes in four colors. A single stomp brings them out of their shells, a double gets rid of them for good." -Mario Mania

"Like fish out of water, Kooopas out of shells are vulnerable, but they can still sneak up on an unwary Mario. A single stomp takes care of them." -Mario Mania

"Swallow a Koopa and spit out its shell. The shell will zip over the ground like greased lightning." -SMW2 Player's Guide

"Shorn of its shell, the Koopa Troopa shows he's no Schwarzenegger. You can make him into an egg, though." -SMW2 Player's Guide

"You can find Shiny Shells or you can stomp on a Koopa to take its shell." -SM64 Player's Guide

"Koopas come in many shapes and sizes, but you can keep just one simple rule in mind: Flip 'em over. A Koopa Troopa doing the backstroke won't be able to do much except wiggle around." -Paper Mario Player's Guide

"This is a Koopa Troopa. Everybody knows Koopa Troopas. They're Bowser's followers...Their shells are hard. If you can flip 'em over, their defense power will fall to 0 and it will become much easier for you to defeat 'em. You can flip 'em with a POW Block or a Jump attack." -Goombario

"Is it just my imagination or did Koopa Troopas used to walk around on four legs? I guess that was a really long time ago, huh?" -Goombario

"Koopa Troopas sunbathe in their shells when it's sunny out. Supposedly, a lot of Koopa Troopas set trends and are totally fashionable. I gues they have different tastes than mine..." -Goombario

"You know, when Koopas are in a hurry, they slide on the undersides of their shells. You wouldn't see anyone doing that around here, these guys are never in a hurry." -Goombario

"This part of the forest is the Fuzzies' main stronghold. The woods would actually be quite beautiful, if not for the Fuzzies. The light's nice...Do you think Koopas do the logging around here?" -Goombario