Welcome to Sonic's World and Phineas and Ferb's World

This is our Heroes went to Sonic World and Phineas and Ferb's World in Ryan's Quest: Chain of Memories.

They arrived in Sonic World and they're in Eggman Lair

Ryan: I wonder where we are?

Crash: Look!

Then they saw Sonic fighting the Heartless and he need their help

Ryan:

Sonic: Wow, thanks!

They are fighting them and they defeated them