-As Bugs Bunny or Taz, hit the other character and they will cough up a carrot or two. You can use this trick to get extra health if you there are no carrots available.
-Keep both Taz and Bugs standing near each other, then hit Taz by kicking him and kill him. Search nearby to find a bouncing box, then kick that box and another Taz will appear with full health. Have Taz kill Bugs and you will get a new Bugs with full health. Note: Don't die between the time you kill the other character and get the new one or you will lose a life. This trick can be done anywhere where a box with a new character will appear.