((I'm gonna skip then. :P))
After catching the Sudowoodo, Kai was going back to Goldenrod to heal it.
He called his Mom on the PokeGear, "Mom, I'm gonna be late" and then hung up as fast as he could. He also forgot to buy some other groceries. He was gonna be troubled.
He entered the Pokemon Center and asked the nurse to heal his Pokemon.
"Would you like to heal your Pokemon?" "Yes, Please." -random healing sounds- "We hope to see you again." "Thanks, Nurse!"
Then, he went out of the Center and threw out the Sudowoodo's Ball.
It was going to need to warm up with him.