Poliwrath, it has the secondary Fighting type so that's extra coverage.
Starmie, one of the best Pokemon in the game, secondary Psychic type and can learn Thunderbolt.
Slowbro is like Starmie, but focuses on Defence more than Speed. Can learn Flamethrower which is interesting...
People dislike the 3rd Generation because it came out right after Pokemon lost most of it's mainstream popularity. It was the worst time to be a Pokemon fan.
It has nothing to do with the quality of the games themselves.
These are the facts:
FR/LG happens first.
HG/SS happens 3 years later. Platinum also happens around this time.
B/W take place a few years afterwards.
There are reasons to believe that Emerald happens alongside FR/LG but they are not definite, and any potential RS remakes could easily change...
Gen V Pokemon with Dream World abilities won't be available until the third game.
The third game will reintroduce the following Pokemon feature.
Overworld sprites for all Isshu Pokemon will be added to the third game.