Team Healer (チーム回復だま, chīmu kaifukudama, Lit: Team Recoverable) is an item introduced in Super Smash Bros. Brawl. Its main use is in Team Mode, where a player can heal a teammate by throwing the item at his/her character. However, opponent characters can get hit and may be healed as well, although it has a chance to damage non-teammates instead. Smash attacks seem to be able to damage opponents, while tilt throws appear to heal them. The amount healed is based on the amount of damage the target currently has.
If you have selected the Ice Climbers, this will work on the computer controlled character, even if there are no teams (e.g. Training mode) or there are no other players on your team. It's simple enough to press the Grab button during a jump to drop it directly on him or her.