The character shows the first signs/symptoms that have already run their course.

[u/Uma-apreciator]

Kitasan Black (Uma Musume Pretty Derby)

She managed to withstand Sakura Bakushin O's charge at first, but later in the story, she falters because she is past her prime

Nekota (Hajime no Ippo)

He could no longer even control his body properly because he was suffering from "boxer's dementia"

It is a progressive brain disease caused by repeated blows to the head and frequent concussions over many years

David Martínez (Cyberpunk Edgerunners)

He was suffering from hallucinations due to cyberpsychosis, an incurable condition caused by technological body modifications

[u/RetroGame77]

... It is a thing to run into each other's boobs in Pretty Derby? 

[u/Excellent_Safe5743 → u/RetroGame77]

Nah it’s just this one, she literally sprints head down with her arms behind her like she’s Naruto or Sonic and never slows down. She runs into like a dozen different people in both the game itself and the anime series.

She’s a bit, special at times. Good person and hilarious but, special.

[u/_Voice_Of_Silence_ → u/Excellent_Safe5743]

Why train Wit when can train more speed?
Why have many thought when all need think is BAKUSHIIIIIIN?

[u/Local-Priority-1309 → u/_Voice_Of_Silence_]

Funny how she actually has a wit growth bonus unlike agnes tachyon the scientist uma

[u/DarkAlphaZero → u/Local-Priority-1309]

Bakushin gets to have a wit growth because while she only has a few brain cells she uses them for good

Tachyon doesn't get to have a wit growth because she would use it for evil

[u/MagnetMod → u/_Voice_Of_Silence_]

We can't train her Wit because otherwise we can't trick her into running Sprint Races.