In MMRPG Prototype every Robot has at least 1 Type for each of the 100 Robots. But some Robots can have more types and I will list all of them down below.
This is just a thing I wanted to do so don't take this too seriously and maybe help me for being dumb

Proto Man - Shield / Copy
This would be the only Copy Type Robot to have a Duo Type. I wouldn't really give Bass Shadow since he doesn't have anything to do with that

Gemini Man - Crystal / Laser
He shoots Gemini "Lasers". Some may say Space but that doesn't have anything to do with the robot but the stage

Shadow Man - Cutter / Shadow
He throws Shuriken's and they are Sharp. It makes sense for what he uses

Bright Man - Electric / Time
He's a Bulb and you give him TIME. WHAT??? HOW IS HE TIME WHEN HE CAN'T STOP TIME ANYMORE?! WHAT THE F-

Toad Man - Water / Nature
Frog's/Toad's are known for nature as they also are on land

Drill Man - Cutter / Earth
Now some may say Missile but he mostly Digs down into the surface and he also has a lot of Drills, which are Sharp

Dive Man - Water / Missile
He's a Submarine and you fight him in Water

Gravity Man - Electric / Space
Obviously Gravity is 0 in Space but I understand why we can't have this :/ Ster men

Gyro Man - Cutter / Wind
His weapon is a spinning Blade Weapon. What else do you expect from propellers?

Star Man - Flame / Space
The Sun is a Star. The Sun burns. A Star Burns. Everything burns from Sunflowers

Blizzard Man - Freeze / Swift
He moves around a lot and even Spin-Dashes at you. SANIC IS DQ BLIZZARD CONFIRFED?!

Tomahawk Man - Cutter / Earth
His Melee weapon is an Axe and he shoots Silver Tomahawks which are spinning Axes that fly

Cloud Man - Electric / Wind
Look at his name

Slash Man - Cutter / Nature
He uses Claws and Slash at you while griping on walls to home on you

Tengu Man - Wind / Swift
He's really fast in both Mega Man 8 and Mega Man and Bass

Sword Man - Cutter / Flame
What did you expect from a Sword?

Clown Man - Electric / Swift
Clown Man moves a lot in the Fight even using a Electric Ball Attack and Spinning

Search Man - Nature / Missile
His fight takes place in a Forest and he is also called "Search" Man

Ground Man - Cutter / Earth
Ground Man is just Drill Man 2.0

Pirate Man - Explode / Water
His Fight is in Water and also he can be in a Bubble

Splash Woman - Water / Laser
She has a Trident that shoots "Laser" Tops of a Trident

Nitro Man - Cutter / Swift
Nitro Man uses Wheel Cutters to attack you and he throws 2 of them (I think)

Acid Man - Water / Laser
I always Consider for Acid Man to have a Laser type since Lasers Burn and Same as Acid. But Flame is a Different Story

Impact Man - Cutter / Impact
Come on Capcom don't make the same Robot 3 Times

Enker - Cutter / Shield
The Mirror Buster reflects into a Pointy Shot and Enker also has a Melee Weapon

Quint - Cutter / Swift
Sakugarne is a Jackhammer

King - Shield / Laser
King has more Laser Attacks than Cutter Attacks

Hyper Storm H. - Earth / Wind
He's a Pig and Pig's roll in Mud

Shark Man - Water / Shadow
Shark's have a Dark Feeling towards them and want to kill you

Planet Man - Earth / Space
Planet's are known to be Rocky

Now for a Bonus!
Soren - Cutter / Freeze / Earth / Water / Shield
This Man is using Illegal Means

I'll Update this soon enough. Just remember that this does break the rules since Robots in each Game/Group can't have the same type
See you soon!