After an active volcano threatens to destroy an entire city, Splendid saves the day by tossing a massive boulder over the opening of the volcano. The townspeople cheer in gratitude and Splendid flies away, satisfied by a job well done. As soon as he leaves, however, the pressure of the volcano sends the boulder hurling into outer space while lava begins flooding the city below. In space, the boulder smashes into a mysterious floating mirror, shattering it. From the broken glass emerges a shadowy figure who zooms down to Earth in a flash of red.
Meanwhile, while Splendid relaxes & hums, he hears screaming and looks over to see a train is headed for a broken bridge running over a high chasm. Splendid lies down across the broken tracks, hoping to connect the two and lead the train to safety, but the braking train hits Splendid's head and derails into the chasm. As Splendid looks on, stupefied, a red squirrel in a blue mask, resembling Splendid, flies down and picks up the train, violently dropping it on land. Splendid gratefully goes to the squirrel, named Splendont, and offers his hand in gratitude. Splendont, however, snubs Splendid and turns away.
They hear more distant screams, however, and look over to see a house on fire with several Generic Tree Friends trapped inside. Splendid and his nemesis Splendont rush to the scene, hoping to be the first to arrive and take the glory. Both end up crashing through the house and come out fighting each other, trading blows before crashing into a hospital. Splendont sits up, only to be knocked away by Splendid, using a large metal pole. Splendont bounces off the roof of the burning house and flies into the ocean.
Splendid hovers over the water, waiting for his adversary to emerge. Suddenly, from behind, Splendont flies out of the water, holding a giant sperm whale. Looking to level the playing field, Splendid flies below the water and emerges, carrying a huge humpback whale. The two swing their weapons at each other, but Splendid obviously has the upper hand, swinging at a downward angle with a larger whale in his hands. The sperm whale breaks to pieces from the impact of the collision and the singing given off by the humpback whale. The massive shockwave sends Splendont hurtling into space.
Splendid carelessly tosses the humpback whale aside, throwing it onto the hospital, before chasing after Splendont. When he gets to outer space, he tries to punch out what looks to be an asteroid heading straight for him, only to find out that it's the moon. Splendid falls back towards Earth, unable to stop the moon, which is being pushed by Splendont. They land on the hospital, where a fire brigade has successfully lifted the humpback whale off the ground.
Splendont dusts off his hands in satisfaction, knowing he has won. When he sees the death and destruction he has caused, however, he flies away, leaving Splendid crushed on the ground. Splendid manages to press a button on a device on his wrist, sending out a distress signal. Before long, Splendid's Supremely Sensational Stupendously Spectacular Super Squad shows up to help their injured comrade. After the credits, we see the group try to wedge Splendid out of the concrete with a giant crowbar, only to have it break.
- Numerous Generic Tree Friends die when lava floods their town.
- Numerous Generic Tree Friends may have died throughout the course of Splendid and Splendont's fight.
- A sperm whale is killed when Splendid hits it with a humpback whale, breaking its body apart.
- The humpback whale is killed along with several Generic Tree Friends when the moon lands on it.
- The three main Generic Tree Friends are flattened when the moon hits the earth.
- Splendid and Splendont punch each other multiple times, knocking their teeth out.
- The humpback whale is most likely injured from hitting the sperm whale and being slammed onto a hospital.
- Splendont hits Splendid with the Moon.
- A volcano erupts in a city.
- A rock is shot in the air by the volcano and explodes when it hits a mirror.
- There are missing tracks on the railroad.
- Splendont throws a train on the ground, shattering some of the glass on the windows.
- A house is set on fire.
- Splendid and Splendont both fly through a house and a hospital.
- The roof of the house is destroyed when Splendont hits it.
- The whale crushes the hospital and an already ruined house.
- The Moon is hit against the Earth, leaving a large crater and crushing two fire trucks and a crane.
- The Generic Tree Friends' clothing is flattened by the Moon.
- The giant crowbar used to help free Splendid breaks.
- The same three animals appear everywhere. This could be because they are Generic Tree Friends.
- The same Generic Tree Friends appear in both the runaway train and the house on fire, despite the two being far from each other.
- The burning house and hospital suddenly become much closer together when Splendid tosses away the humpback whale.
- When Splendont pushes the Moon, Splendid is under it to where his back would be crushed to the ground. When he is stuck to the ground, however, he is lying face down.
- The Moon is much bigger when shown in space than when Splendont uses it to crush Splendid. When Splendont is crushing Splendid, both squirrels are visible. When the Moon hits the Earth, however, it's shown to be about 1/3 the size of North America. This being the case, the moon should have been big enough that Splendid and Splendont would not have been visible when Splendont was pushing it towards Splendid.
- The Moon is the size of a hospital.
- Even though the Moon doesn't roll when it lands on Earth, it crushes the members of the fire brigade despite them not being under it.
- The distress signal on Splendid's wrist doesn't appear until after he has been defeated.