Mega Musthasto is the most powerful Super Form of Musthasto. This form is combined from all 10 of Musthasto's forms, it is the strongest one, and could be known as his Ultra Form.
He can beat any enemies only 5 seconds with his Super Punch Power!!
His only weakness is that he can't beat SuperEmiga's Super Form (called UltraEmiga). Because UltraEmiga is too strong and evil.