They're good, but the Pokemon characters have whit outlines that gets rid of the whole appealment. Also, there isn't any transparency between Arcanine's (whatever it's name is) tail.
to add c4ds, go to planetrenders.net, make an account, go to the c4d section, find something you like, right click it and click save as, then save it, then open it up in whatever you're using and just use it. hope that helped.
btw, your renders are very choppy. try to not get any white left on them. and try to use some renders that blend in with the background. also, your text is very boring. try to find some signature tutorials online that might help you. 🙂
I recommend that for someone of your level you should not start using C4D's until you have the main concepts; depth, lighting, flow etc. When you fully understand these then you can start adding C4D's to enhance your signature. You can find tutorials that cover just depth, or just lighting etc.