Question

How do you make a kangaskhan into a mega kangaskhan?

Comments

You give it the mega stone...

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you should include which game  you are playing in the tags.

Answer 1

So you wil have to buy/obtain the Kangaskhanite and then give it to Kangaskhan as a held item. You'll also need the Key Stone which goes into the Key Items Pocket. Once you have these, enter a battle and click the "Mega Evolve" button next to Kangaskhan's moves and select a move.

Hey presto!

Answer 2

Obtain the Kangaskhanite.

XY: Go to Ambreat Town and go to the Glittering Caves. You find the Kangaskhanite on the right as you enter the cave.

ORAS: Found at Pacifildog Town. It's behind the sign next to the Pokemon Center.

SM/USUM: Get it in the Battle Tree for 64 BP.

Let's Go: Get it at the Indigo Plateau for 30,000.