Yes, Jolteon is very fun. Thank you for following me! Constructive criticism, hmm...
Now firstly, this looks good. I like it already. If you want more realism, here's what I do:
Keep your edges straight and definitive. Make it clear where character begins and ends. (It helps to have a background of a different color.) Also, depending on where the light source is, up to half or more of an area should be shaded darker. Just shade what would make sense. Also in shading, I do several very light gradual layers and a dark layer on the edge like you did. Light shading should be applied sparingly and subtly unless the character is deliberately shiny. Then again, these are tips for realism, you may have a different style, and that's okay. I enjoy it. Hope this helps! Sorry if I sound superior or rude or longwinded, I really think you can do great!

Thanks so much, my style is a bit wierd... I'll try to explain. I do the background colour the same as the main colour of whatever 'mon I'm drawing, in this case yellow, then I over emphisise the light spots and the shadows so you can see the character I'm trying to draw. I'll redraw it with the tips you gave me and upload it probably some time this evening if I can fit it in. Thanks again for your help

Yeah... I like that. It's unique! With enough practice, it could be an outstanding piece of work!

thanks so much!