After walking around, one of the tile corruptions was a tile with mainly white space, but it was surrounded by a curved line. If three of these tile blocks were rotated and put together it would form a large circle.
I am curious if these are used.
Many of us have probably seen the lines like this on 3TrainerPoké's mini-sprite as well.
I think that invalid mini-sprite is in Red/Blue as well as Yellow if I recall correctly. I experimented with Red/Blue glitch mini-sprites after Sawakita documented the starting offset for normal Pokémon's mini-sprites, but 3TrainerPoké is the only English glitch Pokémon that uses it.