Its name consists of three illegible tiles: 199 (0xC7), 161 (0xA1), and 190 (0xBE). It can only be obtained via the Time Capsule exploit with Qwilfish. It often appears in the teams of glitch Trainers. The game brings up an invalid glitch Trainer which freezes the game if it is directly encountered as a wild Pokémon, so it is not available via the Ditto glitch. When traded to Pokémon Yellow Version, it becomes a ゥ▾ ゥ♂.
When first sent out, it shows a corrupted sprite of Nidorino, but fixes it when its HP bar shows up.
Its cry is a higher-pitched and slightly faster version of Nidoran♂'s.
The name of takes up three lines, resulting in the player having to press the A button three times in order to see the name in its entirety. This is because the name is made up of more characters than the amount used in regular Pokémon names.
While both and its equivalent ゥ▾ ゥ♂ both exist in Generation I where there are no genders, Nidorino are always male and ゥ▾ ゥ♂'s name contains a male symbol.