Donkey Kong Country 4
I will probably add on to these ideas, but that's all I have for now.
Below is an image of most of the things in Donkey Kong Country 4. Please note Kongs and Animal Buddies are pretty much complete (unless you can advise me to add other animal buddies), there could also be one new animal buddy, such as...
Spike the porqupine: When you open his crate, his quills will be tucked under, so don't worry. He is like a normal animal buddy that can jump on enemies, except if you press 'y', he will spin around once and untuck his quills, and any enemies who touch his quills will die (except enemies like red buzzards, etc.), and he will also shoot a quill that you can control like squitters' webs, but when it hits an enemy, it will disappear. If you hold 'y', you will shoot a very fast quill that you can't control, but it will not disappear even if it hits an enemy, and will open up secret doors to bonus rooms. You can only have one shot quill on the screen at a time.