Drive Girls

Stickers can be bought in the Parts Shop, can be traded for in the Parts Shop, and dropped by enemies in missions. Everything can be traded for, except for the Bug Parts which are only dropped in higher leveled multiplayer missions (Missions 4 and up). Higher leveled multiplayer missions drop higher leveled stickers, so that's where you should do the sticker grinding. You must have all of the stickers with you at once. There are 16 stickers per category. Here is the list of stickers.

Head:

Clover Head
Gear Head
Fire Head
Safety Head
Drive Head
Energy Head
Laser Head
Over D Head
Multi Head
Bug Head
Lancier Head
U Money Head 1st
U Money Head 2nd
U Money Head 3rd
U Money Head 4th
U Money Head 5th

Right:

Clover Right
Gear Right
Fire Right
Safety Right
Drive Right
Energy Right
Laser Right
Over D Right
Multi Right
Bug Right
Galaxa Right
U Navi Right 1st
U Navi Right 2nd
U Navi Right 3rd
U Navi Right 4th
U Navi Right 5th

Left:

Clover Left
Gear Left
Fire Left
Safety Left
Drive Left
Energy Left
Laser Left
Over D Left
Multi Left
Bug Left
Seven Left
U Rich Left 1st
U Rich Left 2nd
U Rich Left 3rd
U Rich Left 4th
U Rich Left 5th

Body:

Clover Body
Gear Body
Fire Body
Safety Body
Drive Body
Energy Body
Laser Body
Over D Body
Multi Body
Bug Body
Regalith Body
U Stun Body 1st
U Stun Body 2nd
U Stun Body 3rd
U Stun Body 4th
U Stun Body 5th

Legs:

Clover Legs
Gear Legs
Fire Legs
Safety Legs
Drive Legs
Energy Legs
Laser Legs
Over D Legs
Multi Legs
Bug Legs
RR Legs
U Mileage Legs 1st
U Mileage Legs 2nd
U Mileage Legs 3rd
U Mileage Legs 4th
U Mileage Legs 5th