Both of these require you to see the scene with Gori and the female monkeys, and getting him back in your party at the Kuu Tribe caves. Both take place in the field where Gori and Pogo were first exiled to before.
Normally you would have to level Masaru to level 16 to get this technique, in the final chapter, but you CAN get it early!
If you collect the MemoryCard item, you don't have to start Captain Square over each time!
After defeating O.Dio, you will fight Mad Dog on a 1v1 for the final but easy fight. But this time, you have the option to run and it will do so successfully. Mad Dog will then walk away and you battle him again after the credits, this time sparring his life.