Reach the first gate and choose to give your "essence" outside rather than inside. Perform the Blowjob scene and choose to pull out.
Pukamon (lvl 10) → Gomamon (lvl 18) → Ikkakumon (lvl 35, SPD 80) → Zudomon (lvl 55, DEF 200) → Vikemon (lvl 65, HP 4000) gomamon trainer full
Do just rush to Plesiomon. A “full” trainer has at least two branching mega options. Reach the first gate and choose to give