After checking the mail, rescue team Chaotix DX got the latest issue from Pokémon News titled "#21 The Ultimate Dungeon", the dungeon was called Purity Forest. It was said to be the toughest dungeon where one has to enter alone without any items and at a low level. Hearing about the dungeon, Heracross of Chaotix DX was up for the challenge. He did suffer a lot often getting beaten up badly from the enemies fainting where he needed to get help from other rescue teams to revive back to full health. After many attempts, Heracross got to the final floor and his reward was the Time Travel Pokémon, Celebi. They noticed Heracross and immediately joined the rescue team. Celebi took him back to their home camp the Healing Forest, and seeing how bruised Heracross was helped him back to recovery.

Art (Commission) by Geo the Hero

Heracross & Celebi © Nintendo/Pokémon