The story is about Katy, now grown up as a lovely butterfly, and her children, young twin caterpillars names Kiki and Koko, facing off against aliens who came to their forest searching for food which happens to be inhabitants of the forest. With the help of their friends, Katy, Kiki and Koko were able to defeat the alien X and save their forest and its inhabitants. The sequel to "Katy the Caterpillar."
| Actor | Role |
|---|---|
| RRocío GarcelKaty (voice) | Katy (voice) |
| MMaría Fernanda MoralesKiki (voice) | Kiki (voice) |
 Diana SantosKoko (voice) | Koko (voice) |
| GGerardo MoscosoBúho (voice) | Búho (voice) |
| AAlejandro VilleliGilberto (voice) | Gilberto (voice) |
| NNando EstevaneArnulfo (voice) | Arnulfo (voice) |
| VVelia VegarRoseta (voice) | Roseta (voice) |
| JJaime VegaBabo (voice) | Babo (voice) |
| CCarmen DonadioUlrrica (voice) | Ulrrica (voice) |
 Jesse CondeZorrillo (voice) | Zorrillo (voice) |
| LLuis de LeonGrako (voice) | Grako (voice) |
 Tito ResendizMapache (voice) | Mapache (voice) |
| GGraciela EstefanoLagartija (voice) | Lagartija (voice) |
| MMoisés PalaciosTopo (voice) | Topo (voice) |
| CCarlos de PaviaConejo / Y (voice) | Conejo / Y (voice) |
| PPaco ReséndezFrizo / Z (voice) | Frizo / Z (voice) |
| LLuis PuenteNarrador (voice) | Narrador (voice) |
| EEduardo LiñánW (voice) | W (voice) |
| EEsteban SillerX (voice) | X (voice) |