From this point on yea. Defence curl is similar to a move in Pokemon. Using more than 1 in a turn doesn't really happen. Toxic however is cured the same as regular poison in Pokemon so the allowance of more than 1 for that is aknowledged. Rare candies are used outside of battle so they're fine for multiple use. Same kind of Potions fall under the same rule as candies. I think that's everything about each item type....

I'll use a will-o-wisp on blastoise then give blastoise a choice band.
+ Blastoise
- Typhlosion

+ Blastoise

- Venusaur

Buy and use Leer on Typhlosion

+Charizard
- Typhlosion

+Charizard
-Venasaur

You have four days, Uran.

Snipped for sake of civility.

+Typhlosion

-Venusaur

+Blastoise
-Typhlosion

In all honesty, it was simply my bad for not fully explaining. I kinda expected too much from people so the multiple use of certain items I expected to be understood however I did a bad job of explaining that.

Well, if it's accidental that's not such a bad thing I suppose.  But this is a game which people assume is going to give come back mechanics (otherwise why not have a straight vote) so where there are ones apparently there, they are going to presume it functions that way.  Further explanation would have been better.  And also, in future games just stick it out with the established rules imo unless it is just completely screwed up (like the infinite loop buy-sell thing).  It's unfair to people trying to strategize to change the rules as that can have massive ramifications for said strategies.

+Blastoise
-Typhlosion
Defense curl on blastoise