[Advancer]

@JSND: I suppose where Treecko will be tiered depends on how people feel about Shroomish - it can be caught in Petulburg Woods, learns Stun Spore and Leech Seed, and recieves powerful fighting STAB at evolution. It can be taught Bulk Up, Sludge Bomb and make good use of the usual normal-type TMs. I suppose both fill different functions, and you could even use them together - but Treecko is just too reliant on important TMs if it wants to be an attacker, and its support moves are TMs too. I guess I agree with you that Treecko isn't as good as other High Tier mons, but it is better than many of the mons in Mid Tier...

On the discussion of Makuhita, I'd say it is a waste to teach it Earthquake as it is rather redundant with its fighting STAB. As for the 'hitting ghosts' argument, a few of the Ghosts and even Lunatone/Solrock have Levitate. You're better off using the Rock Tomb TM on it so it can hit Flying-types, which is what I did with Mankey in my recent LeafGreen run.
On the subject of in-game trades, the Slakoth-for-Makuhita trade at Rustboro in R/S isn't as good as it sounds - it is locked into a Hardy nature with 5/5/4/4/4/4 IVs. I suppose that is the price for getting it earlier and at a time when it is immediately useful... nonetheless, it still has the same performance issues in the late-game. Sticking with Mid Tier on this guy.

@RedMeowth: Sounds about right for Tentacool.

@Hemp Man: You're right... oversights on my part.