Complex sentence: Mewtwo and the Red Genesect prepare to resume their fight, but Ash runs between them and tells them to stop the other four Genesect move in front of Ash and beg their leader to cease attacking.
Split into simpler sentences: Mewtwo and the Red Genesect prepare to resume their fight, but Ash runs between them and tells them to stop. The other four Genesect then move in front of Ash and beg their leader to cease attacking.