I can be seen in blue or yellow but never in red.
I will really wrack your head.
My type is very puzzling as it is different from what is read.
Cant be found in Pokemon Red.
Has huge pincers on its head.
Its Red/Blue pokedex entry says: If it fails to crush the victim in its pincers, it will swing it around and toss it hard. This is usually something a Fighting type Pokemon would do, not a Bug Type.