To proceed with the story, visit the Nameless Village. There is some gossip there about your father.
Ken appears and challenges you to a duel. Take him out easily.
Visit Padorko, talk to Takah, and enter the tourney. Drive to Coneha. Go to the hotel. where the owner gives you a HPRes100.
There are 4 rounds of combat at the tourney. You can rest and buy equipment after each one. Unfortunately, you are not able to reach the finals due to an unexpected problem. You'll need to go to Tasmatan to check it out.
Hug left wall. Destroy rocks for some money and a shortcut.
Start by heading to the left. Jump onto the rocky area and destroy the gun to get a NapMiss. Now cross over to the other side of the route and jump over the rocky area to get a PBodKKC. Continue on the right side to encounter a large vehicle that drops CardOD22. This gives you the Invisible Overdrive.
In Tasmatan, you'll encounter a familiar face. Casey is back, and he's piloting a large mecha. But he's still as easy as before. After defeating him, the tournament will resume and you'll face Ken Kaido in the Championship bout. Ken quite a bit harder than Casey, but still nothing you can't handle. After winning, you get some money and a complete Tiger gun vehicle. Check your garage to find a car with TChasSPR, TEngST1, TBodBo2, CrssVulc, LsrMine, APCannSP, and RearShll.