Disclaimer : this is an AU where Bowser Jr and Toadette are older I do not ship them in canon

So its no surprise that Toadette from the start of Mario Party DS is really into music and has a lot of intrest it. So I thought it would be intresting if AU Bowser Jr had a talent for some type of musical intrsument in particular a guitar. In my own headcanon Junior had learned this ability a few years prior to meeting Toadette in his younger teen years. Since he had no one to talk to at the time and playing the guitar was his only way to release this frustration due to lonely ness. In this scene in particular, Toadette found out about his talents after discovering him near the end of Toad Town strumming it. Of course with Music being her peak of intrest Junior has the intention/idea to teach her.

Drawn in Paint Tool Sai and Photoshop CC