treemight

The Tree of Might

Oolong, Kuririn, Bulma, and young Gohan are on a camping trip, when a spy satellite crashes into the forest and starts a raging fire. Kuririn and Gohan battle to put out the blaze, then gather the Dragon Balls to wish for the forest to be restored. One of the animals they save is a Haiyaa Dragon (Higher Dragon) that follows Gohan home to become his pet. The two of them (and Gokou) play together and have a lot of fun, but Chichi wants the dragon sent back to its mountain so it'll stop disrupting Gohan's studies.
Meanwhile, a Saiyan fighter, Taurus, and his minions are scouting Earth to locate Kakarot. Turles wants Kakarot and/or Gohan to join him to go trash planets. The minions plant a seed for an energy-eating tree near the restored forest -- Turles plans on eating the fruit of the tree to get a "power up." The tree grows quickly and threatens to destroy Earth. Kaiou-sama alerts Gokou to the danger, and everyone (Chi Chi prevents Gohan from joining in, but Haiyaa Dragon kidnaps the boy to take him to the battle) goes to fight Turles. Piccolo joins in to save Gohan, but the demon still plans on killing Gokou later on. Gokou denies his Saiyan heritage, claiming that he's happy to have been hit on the head as a child, rather than growing up to be like Turles.
There's a major battle, and Gokou uses a Genki Dama to kill Turles and destroy the tree. Afterwards, the Genki Dama breaks up, and the lifeforce energy repairs the damage from the tree.

Characters
Shinseiju -- The energy-eating tree.
Turles -- A Saiya-jin Warlord that looks like Gokou. Killed by Gokou.
Amond -- Turles's big Indian minion. Killed by Gokou.
Daiizu -- Turles's muscular punk minion. Killed by Gokou.
Kakao -- Turles's ugly, silent lava-man minion. Killed by Gokou.
Rezun Rakasei -- Turles's arrogant twin runt minions. Killed by Gokou.
Haiyaa Dragon (Icarus)-- Gohan's cute little pet. Fiercely loyal; like Piccolo is.