Drumliners

Hey, so this is gonna be short. These guys are based on crabs and drums or any kind of percussion instruments. One thing about these guys is that I've also created a special place just for Bongrab's evolution, the Sound Cove, which in my mind is this cavern with a structure that is conducive to amplifying sonic vibrations. If you level up Bongrab to level 29 or past that in the Sound Cove, then it'll evolve into Percuspace.

BONGRAB (BONGo + cRAB): Bug; The Drum Pokémon

Because they live underwater or in dark caverns, these Pokémon communicate by using their claws to bang on the tops of their heads. The ability of the BONGRAB to decipher each others' meanings is said to be a primitive form of telepathy.

EVOLVES AT LEVEL 29 IN THE SOUND COVE

PERCUSPACE (PERCUSsion + caraPACE): Bug/Psychic; the Cymbal Pokémon

PERCUSPACE use their cymbal-like claws to create sonic pulses and telekinetic shocks, which can be used for offensive purposes. It is because of this ability, which also allows them to levitate, that PERCUSPACE lose their legs on evolution.