What are things that pokemon is missing that other monster series have or things that should have been around earlier?

>no dolphin or even dolphin hybrid
>took 7 gens for a fucking wolf while almost all the others had a wolf from the jump
>hood wearing dude
>planarian
>no skeleton
and a skeleton mask like cubone doesn't count, nor does Eternatus, it seems like polygons more so than a skeleton, also there was a cancel'd skeleton
>chimera we got was shit and is a vague chimera
>no dullahan
>5 gens for haunted armor
>still no hadrosaur
>5 gens for a yeti
>5 for a fucking samurai
>still no orochi
>still no Kasa-obake
that shit is basic
>other organs
no lung, brain or intestine pokemon, but we have heart and stomach.
>7 gens for a roach that is the opposite of a roach