You have enough mana to cast Cackling Counterpart.
({2} magic symbol) ({U} magic symbol) ({U} magic symbol) plus enough mana to pay for commander tax, if applicable available.
Steps
Cast Cackling Counterpart by paying its mana cost, targeting a creature you control.
Holding priority, cast Naru Meha either from your hand or from the command zone by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) plus commander tax, if applicable.
When Naru Meha enters the battlefield, it triggers, copying Cackling Counterpart, targeting Naru Meha.
Resolve the copy of Cackling Counterpart, creating a token copy of Naru Meha.
Put either Naru Meha into your graveyard due to the legend rule.