It's ok. I'll give you Slowking and Karo Rushe can give you Walrein so you end up with the same Pokemons anyway.
Edit: Considering the below post, I'll give you Walrein and Slowking. Just toss in Cherrim for me.
Edit again: If it's cool with you, can I get Buneary instead of Hondour? I just caught a Hondour of my own. If not, that's fine.