Real Life Pokemon
Mega Pokemon
Mew + Two = Mewtwo
Legendary
100

An Axolotl inspired this pokemon. It has no arms.

Wooper

100

This is the only mega pokemon to lose a type when it mega evolves.

Mega Aggron

100

Not margarine + Something that costs nothing?

Butterfree

100

Ho-oh created this legendary trio.

The legendary dogs/beasts.

200

This pokemon is a mythological counterpart of a Tapir called a "Baku." This is also the origin of its dream based abilities.

Drowzee

200

These two pokemon gained +70 in one of their base stats upon mega evolving. 

Mega Beedrill and Mega Slowbro

200

Revolvers have 6 of these + What you plant to grow a tree.

Bullet Seed

200

This single legendary has 3 different forms

Mewtwo

300

Dragalge

300

This mega pokemon did not receive a +100 BST until gen 7 when it was buffed.

Mega Alakazam

300

Type of precipitation + What a moonwalk is

Rain Dance

300

None of the pokemon in this trio have ever been in OU.

The Titans/Regis

400

Sandshrew

400

This mega pokemon learns no STAB moves for its new mega type.

Mega Pinsir

400

A 1500 year old board game + slip, hitch, noose, overhand and figure 8.

Chesnaught

400

This generation where weather is the most integral to the meta ironically included this pokemon trio.

The forces of nature.

500

This pokemon is based on a real sea creature known for shooting with its larger claw.

Clauncher

500

These two pokemon can take on the form of a mega pokemon despite not owning a mega evolution.

Mew and Ditto

500

The time between sunset and sunrise + There are 7 of these in a week.

Night Daze

500

One of the pokemon from this trio represent emotion.

The Lake Guardians.