Then they should just have Ash and the female character travel together. Brock has no real use in the show. Time to go.
Do you know who really needs to go? Certainly not Brock. The writers are actually making it damn sure that Ash and Dawn are practically unable to really take care of several living creatures, all of them with needs that are different. Sure they can train them for battling or for contests, but in the end, they're unable to do the basic domestic duties.
You may not like it, but it's for their own good.
As for closure, I think Brock will meet a Chansey-less Nurse Joy with his then-evolved Chansey and fall in love with her and stay with her.
Where the flying **** are you people even getting this from? Seriously, have they ever made someone leave the group over a single Pokémon in their party?
Also, none of the protagonists release any Pokémon anymore. That's now only done by Team Rocket.
Also why on earth would a Nurse Joy even be without a Chansey, and would be in need of one, specifically Brock's? Wouldn't they just breed their own Chansey/Happiny to replace a dead one?
You just want a quick fix to get rid of a character that you think is boring. Despite the fact that the writers still plan on keeping him.
Why the hell is this thread still open?