too C+P!!! the first trainers arms look really deformed.
The bowser one also looks messed up..you just took dotaitos's shell and slapped it on with some spikes..
It lacks quality.
Good ideas, bad construction. Read the Tutorials for splicing and such, and make sprites smoother when you splice. Don't be afraid to spend more than five minutes on them. Infact, spend a day, or more, untill they look perfect. Rushing never gets you anything but a big pile of trash. And people that don't like what you make.