All 8 Hearts
All 4 Sub Tanks
All 4 Ride Armors
And all 4 Body Upgrades EXCEPT the any of the Chips
Now go to Doppler's Lab 1 and go all the way through the level until you reach the part with the falling spike balls. Now make sure you have FULL health and jump down the hole on the left. Make sure to cling to the left wall and near the bottom you will fall through an invisible wall. Finally there should be a redish pink capsule. Hop in and when you come back out you are Golden.
You now have all 4 Body Chips in one. So you can now dash twice in mid air, take enven less damage, recover health when you stand still, and a new power has been added to you ability list.