Because you like Conker the Squirrel in Conker's Bad Fur Day
Michaelangelo is an above-ground crime-fighter by night, and a pizza-eating, sewer-dwelling mutant ninja turtle by day. See them in Teenage Mutant Ninja Turtles.
Illiterate and oblivious, Crash Bandicoot is still a hero. See them in Crash Bandicoot.
Spyro the Dragon loves getting into trouble around the Dragon Realms. See them in Spyro the Dragon.
Prideful and psychotic tendencies combine to make Dr. Eggman a dangerous and villain who will squash anyone in his path. See them in Sonic the Hedgehog.
The witty Aku would be an ideal dinner guest, if he weren't a demon. See them in Samurai Jack.
Relentlessly cheery Ned Flanders enjoys a nice piece of bread with water on the side for dipping See them in The Simpsons.
Knuckles the Echidna is a 16-year-old red echidna (aka a spiny anteater) and guardian of the ancient Master Emerald. See them in Sonic the Hedgehog.
Aldo Raine is in the killing Nazi business. And as he says, business is a-boomin'. See them in Inglourious Basterds.
Tail's smarts and helpful nature come in handy in a pinch. See them in Sonic the Hedgehog.
How lucky are we that Arthur Curry, the King of Atlantis, hasn't taken over the surface world? Very! See them in DC Extended Universe.
Crono may not talk, but this time-traveling hero's heart speaks volumes. See them in Chrono Trigger.