Ok so i logged on to battle rondo yesterday and I had three new weapons and a set of red and white legs i've never seen before. All of them were completely function and there is a sword, what looks like a plate, and i think a trident for the weapons. Why do i have these?
Then when i went to the Battle Lobby (no idea what it's really called) there was a new option with an upward pointing arrow and a wrench. what is that?

Recently, there was a 3rd Anniversary event going on where they gave everyone a "Birthday Candle" weapon. That's probably the trident that you're talking about. Along with that event were some missions where you could earn PP to use in that new option you see. The new option at the Shinki Center allows you to make and upgrade equipment using PP and GEM. The event for this was cancelled or postponed though, so it's fairly useless unless you were able to build up a lot of PP before they took it down.

Oh ok. thanks. But that still doesn't explain the sword, plate and legs. XD any idea what those are for?

You probably managed to get some achievements.

If you really must know what you did to get them, we'll need screenshots or the item names.