The Land before Kanto Chapter 9

Little Leaf, Lars, Archie, and Dragoon were swimming their way to the great valley. Suddenly, Archie noticed that Groudon again and shouted "Ahhhhh, Earthtooth!"

"It's Earthtooth." Said Dragoon. Earthtooth was walking on a mountain, even though he weighed over 2000 pounds.

"Let's finish him once and for all." Declared Little Leaf.

"What do we do?" Asked Dragoon.

"We'll coax him to the deep end of the pond." Little Leaf explained. "He can't swim being weak to water. Me and Lars will push a big rock onto his head, and he'll fall into the water. Archie, you whistle when it's just the right spot: where the water gets dark. Now we need some bait." The others looked at Dragoon.

"Me? Oh, no. No, no, no, no, no, no, no, no..." The Axew protested, but she was the best choice. She went up to the cave where Earthtooth was lurking and hid behind a rock. Dragoon screamed to get Earthtooth's attention. Earthtooth managed to find her and chased her out of the cave and right under the cliff Dragoon's friends were on.

"Help!" She pleaded, hiding under a rock in the water. Earthtooth was in the right position, giving Archie the opportunity to whistle. Little Leaf and Lars started pushing the boulder. Earthtooth noticed the Boulder move, making a chance to jump on it. Archie threw a pebble at Earthtooth to distract him, and for his own amusement, but the Groudon got mad and head-butted the rock wall, causing Archie to fall onto of Earthtooth's face. Thankfully, Archie was saved when Earthtooth blew air from his nostrils. Suddenly, Archie noticed something: he was flying!

"I flying. I flying!" The Archen yelled happily. He swooped down save Dragoon, who was on top of Earthtooth's face. The Groudon used Rock Climb and stood on top of the boulder. Then, a familiar voice was heard.

"I'm coming!" Erin yelled. She gave the final blow, pushing Earthtooth into the water. However, Archie had his foot stuck in Earthtooth's teeth, sinking into the pond with him.
Author's Note: I am so sorry that I had to kill off another Legendary (in How To Train Your Dragonite, I killed off Zygarde). My hunch is that a few million years after the Prehistoric Pokemon went extinct, the lake that Groudon fell in dried up. However, by this point, there was nothing left of the Legendary Pokemon but a skeleton. One day, Mew, who is said to be the ancestor of all Pokemon, spotted this skeleton and, using telekinesis, carried it to a nearby cave and revived it, bringing it back to life. Groudon then slept from then on, until a special Trainer will be able to tame it.