Okay so...I obviously don't battle much as evidenced by my following problem and question:

I went to battle Little Escarcha using my pet, Godfather. I wasn't doing any damage, and figured out I needed a new weapon, so I went to the boards, got the weapon to try again. However, I can't seem to get back to any sort of page where Godfather is battling anyone. I went to a new page in the middle of the battle (which I would have had to leave anyway because non of my weapons were doing any damage.) I went to the battle Colosseum page, but can't find a way to get back to the battle, much less how to leave the battle so I can try again with the right weapons.

tl:dr: I can't figure out how to get back to battle I am in the middle of. Also, can I back out of a fight to start over?

I think this is the page you're looking for?

http://subeta.net/games/battle/battle.php

I'm also stuck trying to figure out how to forfeit.

http://subeta.net/games/battle/stats.php

here you can forfeit your battle.. I guess this is what you are looking for :)

Thank you, both! That helps a lot. :)

Now, let's get properly geared and show those dummies who's boss!

Indeed! I'm already working on it. I'm glad they gave us battling in the plot today, it's giving me something to do while I am staying home on a Saturday night. Haha