In speed form, he takes 3 damage. Defense is 1, while attack is 5. Press space to shoot a fireball at Deoxys. WASD to move. Update - 10/31 - Made it much more difficult, adding deadly walls and blue that crashes over you randomly. Also made Deoxys take less damage overall, made Mario shoot a fireball, and made it hurt when Mario touches Deoxys. 11/1 - Updated sprites a bit. 11/3 - Made attack form a lot stronger 11/7 - Okay so i made it impossible to die, oops. Fixed.
Credit to Nintendo for Deoxys and Link, @csf6043 for the music (well, I had to make it myself, the music file was too big. Same music though), and Smash Bros for the concept. Artwork: Credit to myself for Mario and the stage, Scratch for the variables, and Nintendo for the Deoxys sprites. I'll try to get CSF to make his own Deoxys sprite soon, as this is just a placeholder.