The Rise of RizeGreymon!

Episode 13:
When Merukimon appears, Marcus tries to punch him but he cannot reach him. As Merukimon blows him away, GeoGreymon tries a Mega Burst, but the attack does no damage to Merukimon, who then reverts all three Champions back to their Rookie level and just as he is about to destroy them, Biyomon sacrifices himself to save Kristy. Merukimon and Falcomon then return to the digital world after retrieving Biyomon's egg.

Back at DATS headquarters Marcus argues against everyone that they should go after Merukimon rather than sitting around doing nothing. The team begins to think that it was Merukimon that lowered the barrier between the Digital and Human worlds. Kristy then arrives and says that humans and digimon shouldn't fight but get along and be friends. The director of DATS then arrives and says that if the DATS team cannot do more he will shut down the DATS program, much to the annoyance of Marcus. Back at Merukimon's lair the Digi-Egg of Biyomon hatches and immediately is reborn as Biyomon who, as he retains memories from his previous life, immediately begins searching for Kristy. He digivolves into Aquilamon and goes to the Human World.

Aquilamon is quickly spotted by a news crew and is put onto the news quickly. Kristy sees Aquilamon and rushes to go and find him. The DATS team arrives on a motorboat to try to fight him, but Marcus soon discovers that the Aquilamon is actually Biyomon. Aquilamon soon defeats the DATS team and they are washed up on shore. Searching for Kristy Aquilamon causes major destruction, so Agumon digivolves to GeoGreymon to battle him. However Aquilamon, after taking GeoGreymon's Mega Burst, digivolves to Garudamon. Kristy arrives to try to talk Garudamon out of fighting but Garudamon, confused, launches a Wing Blade at her. GeoGreymon takes the hit and when Marcus realizes that there is nothing he can do, he comes to the conclusion that he needs to become stronger. He is then surrounded by the DNA charge, and GeoGreymon digivolves to RizeGreymon. RizeGreymon uses his Trident Revolver to defeat Garudamon and he reverts him back to a Digi-Egg. After the battle, Marcus gives the egg of Biyomon back to Kristy and vows to always protect her. The DATS team then plan to head off to the Digital World to meet with Merukimon, but Commander Sampson explains that he has something to say regarding Marcus' father.