Could you have him recruit Gentle Criminal, La Brava, Twice and Rappa and have them as side kicks also could you have him sleep with Bubble Girl, Sirius, Ms Joke, Midnight, Burnin, Miruko, Ryukyu, Uwabami, Inko, Mitsuki, Rei, Fubuki and Mika
A suggestion for power-up. What about synthetic wood? He could potentially absorb these modified woods with better properties than real wood and ta-da!