Was our regular commenter Timely-Tardis-Lego a secret consultant on this film? This particular $20 set is called Cloud Cuckoo Palace, and appears to feature a slingshot to hurl flowers. The pink pony thing is actually revealed as a unicorn-kitten, which goes by the no-duh name of Unikitty. The snail does not have a name, but the incongruous Terminator thing is called Executron.
Here are some of the other characters from the movie, sold separately as $2.99 individual minifigs. Meet William Shakespeare, Gail the Construction Worker, Panda Guy, Abraham Lincoln, Taco Tuesday Guy, Larry the Barista, President Business, Calamity Drone, Marsha Queen of the Mermaids, Wild West Wyldstyle, Scribbe-Face Bad Cop, Velma Staplebot, Hard Hat Emmet, "Where are my Pants?" Guy, Mrs. Scratchen-Post and Wiley Fusebot.
And finally, for $90, we have the lair of the villainous Lord Business, which includes Emmet, Vitruvius, Ma Cop, Pa Cop, Lord Business and wrestler/Master Builder, El Macho Wrestler, and brick-built Biznis Kitty.
Those folks at Lego, they thought they were building playsets...but all along, they were really building a bridge to my heart.