"Genie President" is the twenty-first episode of the fifth season of Teen Titans Go!, and the two-hundredth-thirtieth overall episode of the series.
Robin hatches a plan to get rich off pennies, but Starfire believes they are magical.
It's another day in the Titans Tower, and you know what that means! Robin has something to announce to the fellow Titans. Starfire, Raven, Beast Boy, and Cyborg are on the couch. Robin enters the living room with a mysterious box. Raven gives Beast Boy and Cyborg a heads-up and claims that there will be nothing good in the box. Robin continues with his little announcement, and he eventually shows them what's in the box - a penny. Raven affirms her statement by saying, "Told you there was nothing good in that box." They start to complain about how it's just a penny and that there is nothing special about them. Robin, however, states the opposite of what they are saying, and claims that pennies are special. He starts going on an in-depth explanation about pennies. The main thing he points out is that you can actually make profit off of pennies. He says that pennies cost 50% more than what it's actually worth. The Titans start questioning him.
The 'Rich Duck' Raven acknowledges, as well as the Titans (except Starfire) attempting to swim in the pennies is a reference to Scrooge McDuck from Disney's DuckTales.
The Titans swimming in coins is also a reference as well.
Raven and the boys getting horrendously hurt after leaping onto the pile of coins might be referencing how Peter from Family Guy also suffered similar consequence from doing so, though of course blood is censored.
It is NEVER possible to swim in pennies in the first place, because the copper inside the pennies are what makes these coins heavy. Therefore, pennies can't flow over one another easily.
However, this doesn't apply to this series aside from Raven and the boys getting wounded, since this show always eschews common sense.
Robin persuading the Titans to melt pennies for profit.