Most powerful anime character? And their ability?

I'd have to put in a word for a few, such as Saitama from One-Punch Man, Goku from Dragon Ball, Bouya from Crows and Tatsumi from Beelzebub. To be honest, those are the only ones that come to mind right now.

Saitama is just so plain and plain powerful that literally, as the name suggests, one punch kills all (generally).

Goku is a life form from another planet (where aliens actually become common place throughout the series) where he's basically superhuman and grows stronger and more powerful over everyone else unrealistically fast. (funny character :D)

Bouya has to be the most normal character out of the four named. He fights with his fists in high school fights (don't diss, it's pretty good I tell ya).

Tatsumi becomes a contractor of sorts to a demon baby that grants him powers involuntarily initially. No it was not on purpose, but he did eventually harness it to become super strong OPing everyone :D.

These four are the only ones that I can currently think of but they're mainly OP characters so should be good :)

Well these are my favorite character

Onepunch Man, Saitama, abilty: godlike punch

Mahouka Kouko, Tatsuya, expert fighter, decomposition, and Regrowth

Hataraku Maou-sama, Maou, a demon lord feed power from people fear

Hellsing, Alucard, a legendary ancient vampire

Zettai Karen Unlimited, Kyousuke, awesome epic esp power

Mondaiji-tachi, Izayoi, smart and powerful power, who doesn't like this guy?

Gintama, gintama, not absolutely powerful but he's awesome!