If you know anything about battles, you'd know there are various strategies. Some are quite cheap in my personal opinion, but they are strategies nevertheless. The biggest three in my opinion are:
- Wallthrowing. This is when you go up to a wall on stages such as GCN Cookie Land and throw your item over the wall (versus going around the wall to get the person).
- Respawn hits. This is a huge problem on stages like GBA Battle Course 3. This is when you have all your balloons popped in a balloon battle, you die, respawn, and before you can even get an item; your opponent comes over to hit you and you get hit since you didn't have an item to protect yourself with.
- Stealing item boxes. I think this is the cheapest of them all. If you hit someone with red shells or something, you steal the item boxes within close proximity so the person can't get an item box and you can hit them again.