[@rush99999] Looking good overall, but just a couple of points I'd like you to consider.

[quote=@rush99999]
[b]Stats:[/b] [b][color=00ff00]Health 17[/color] / [color=00ccff]Defence 4[/color] / [color=ff0000]Attack 4[/color][/b]
[/quote]
Since you get [color=00ff00]+5 Health[/color] for each [b]Skill Point[/b] spent Jacoby's Health should now be 25, rather than 17

[quote=@rush99999]
[b]Skills:[/b]We are the champions: Jacoby play's a tune on his magic guitar that inspires his allies and increases their stats by 25% for 4 turns. (Energy cost: 4)
[/quote]
If this power is going to last for 4 turns then it's a little too cheap. I'd say make the cost 8 Energy, or make it variable at 3 Energy/Turn

Since Abilities only work on the turn they trigger, any lasting effects would require a Status Effect to be activated. How about making it work something like:
[indent][b]We Are The Champions:[/b] [color=yellow][b]Cost 3/Turn[/b][/color]; Jacoby plays a tune on his magic guitar that inspires his allies, triggering the [i][b]Inspired[/b][/i] status effect which increases their Attack and Defence stats by 25% while active.[/indent]
Jacoby would be able to maintain the music for four rounds before running out of Energy, but would then have to stop and rest before playing again.