Lololo and Lalala are essentially renames of Lolo and Lala from Adventures of Lolo, just with one more syllable. They resemble their Adventures of Lolo counterparts, but they are mouthless. Despite this, they can speak.
Kirby's Dream Land
Lololo appears as a mini-boss in the second stage on his own, in Castle Lololo. In combat, Lololo pushes boxes that can be vacuumed up and used as ammo against him. Soon after that Kirby fights both Lololo and Lalala as the main boss of the stage.
Kirby Super Star
Lololo is no longer a mini boss and now have he and Lalala are fought on Float Islands since there is no Castle Lololo stage in this game. There are also three rows instead of four when Kirby fights them. They are also a boss in The Arena.
Kirby Super Star Ultra
Lololo is still not a mini boss and he and Lalala have 3 rows just like in the original Kirby Super Star. In Revenge of the King, Lololo and Lalala are now Lololo and Lalala's Revenge and have 4 rows instead of three.
In the anime
Lololo and Lalala are Tiff's friends along with Kirby and Tuff. In The Fofa Factor, they are revealed to come from Lola. Lola was cut in two by the Demon Beast Kittarihattari as punishment for his peaceful beliefs when King Dedede ordered him.