All rookie Digimon Digivolve at lv. 16. I'll know
Easy Tech. Up
In the Dryland area there are 4 Purple towers that continuously spawn scorpion like things. You keep attacking them with any weapon or MP technique you like and eventually it will raise your Tech. Whatever you do DON'T HIT THE TOWERS TWICE! This will cause the tower to be destroyed and stop the swarm.
Easy Exp. And Items
Once you get to the outside of the Doom Dome
(after you save all the Digi-Elves at Numenume
River) You should defeat all the Digimon in that
area then cut down the whole line of bushes to
get to the safe point, use a gate disk there and
go back to the Terminal Area, go to the Heal
Circle and then go back to the Emergency Gate and
keep battling!!! Every time you battle, you'll
get HP disks, and Gate disks, so keep going back
and forth until satisfied!!!
You have to find a switch at Mummy Desert area and switch it on.