Help: Bottom of drain

Hi, I'm looking to get help with an issue I'm having in game. Let me know if this violates any rules here and I'll take it down immediately.

I got past the bleached king today. Yay!

I went down the bowl and fought the oceans rage. Unfortunately I died. No problem I went to respawn and realized that I had accidentally favorited a heavy shell from my shell insurance. I went to go change it back only to realize there is no way out.

Is there any way at all I can change my default shell back to the small size one I'm used to? I'm happy to use cheats or whatever but I am on switch.