There are three known variations of the scrambled Bulbasaur in English versions, including glitch Pokémon /PkMn ▼PkMn and Glitch Pokémon (0xEB) in Pokémon Red and Blue (Dodrio hybrids), as well as ゥ 4- 4 in REDIRECT Template:Yellow (an Articuno hybrd).
Since /PkMn ▼PkMn and Glitch Pokémon (0xEB) both share the same family and an index number greater than 0x98, they both have the same sprite sourced from 0D:4000 (Bulbasaur's sprite), but with dimensions of 7x7 instead of 5x5; which is the cause of the glitchy sprite.
ゥ 4- 4 has its sprite sourced from 0B:4000, also with dimensions of 7x7 instead of 5x5. Like in Red/Blue, the sprite maps to Bulbasaur but the wrong dimensions of 7x7 cause the sprite to appear glitchy.
Scrambled Bulbasaur may also refer to Bulbasaur affected by the inverted sprites glitch, especially those from ZZAZZ glitch corruption.