This is Miles "Tails" Prower
Here are these characters that are similar to him[]
Luigi (Super Mario series)
Gohan (Dragon Ball series)
Donatello (Teenager Mutant Ninja Turtles)
Guan Ping (Romance of the Three Kingdoms)
Liu Shan (Romance of the Three Kingdoms)
Shingo Yabuki (The King of Fighters series)
Ken Masters (Street Fighter series)
Scarecrow (The Wizard of Oz)
Ma Chao (Romance of the Three Kingdoms)
Bentley (Sly Cooper series)
Krillin (Dragon Ball series)
Daxter (Jak & Daxter series)
Clank (Ratchet & Clank series)