You can't create your own images for the Pokemon or attacks (Though there maybe developments in the future allowing you to do so).
But you can make Pokemon mashups with Pokesav. In the Pokesav program you can choose what level, the name, and attacks for the Pokemon. As well as many other stats.
For more on Pokesav go http://projectpokemon.org/editingresearch/pokesavgettingstarted.php http://projectpokemon.org/editingresearch/pokesavdownload.php and http://www.instructables.com/id/Using-Action-Replay-Ds-with-Pokesav-and-Pokemon-Di/
Yes, someone could make an Action Replay code like that. Why don't you go and try?
yes at supercheats.com/pokemon heartgold action replay codes
An action Replay is a cheating item. It make's it so you can get free Pokemon by typing in a code.
you could go to www.codejunkies.com and request a code for action replay
No.
With pokesav
No!
You cannot make the Pokemon shiny, except for an action replay code, you must capture one. You cannot make the Pokemon shiny, except for an action replay code, you must capture one.
Use Action Replay
Yes you can.
no not that i know of, for the action replay dsi it doesnt let u do that.
GO TO pokesav.org MAKE YOUR OWN POKEMON!!!