How to upgrade / level: "Reckless Wukong Spirit" ? :D

[Caldera]

So my friend got this in an egg and she want's to know how to level or find use of this thing lol. Help?

[Andy]

Wukong spirit cannot grow :c
The only spirit that grows and is attainable atm is the current one in eggs. The love something @_@ pink thingy.

Also, they grow at the npc Trisha... Near the middle left side of SH map.
You need other spirits to grow spirits, so keep the ones that can grow, and sacrifice the ones that cannot.