4th Gen A Pokemon that could've fit into the Gen 4 dex

[Mr. Meme]

Do you think there's a Pokemon from a previous/future generation that would've fit into the Sinnoh dex (As in be a new Pokemon in Gen 4)?

I think Milotic could've made sense. Arcanine as well.

 

[Mystelex]

Chimecho and Luvdisc? Yup, that'd be it.

 

[Sektor]

That other heart Pokémon that hugs things. Luvdisc and Alomoma are near identical and would have been prime candidates to be evolutions.

 

[tokyodrift]

I do think Luvdisk and Alomola should have been. They really should have been evolutions of each other. I also think Feebas and Milotic could fit in there as well.

 

[Ace Trainer 188]

Urm Milotic is in this gen's dex? For both DP and Plat even.

I thought this gen has already a decent dex so there wasn't anything more I could ask honestly. Maybe more Ice mons I guess?

Edit: Oh wait. The OP meant an existing mon that could make sense as a new mon for this gen. But again I kinda feel all the new mons here felt complete so I can't really ask for more tbh.