Part 3, the real rival.
You start in luxoria city, and cycle to the first gym. However, as yiu're about to enter it... THUD. Someone comes out of the gym, and bumps into you. He had just won it, but lost it thanks to you. He's mad, and says something alongthe lines of:'' this isn't the last thing you've heard of...(truck passes).'' Then you're challenged to a fight. Of ciurse he has the ''good'' starter and is at like level 15. You're beaten and get send back home, with the 'friendly advice' to not get into his way or to challenge the gym at thst moment of time.
(Alternate scene: if you are possible to beat him, he admits defeat, but ad yiu're close to a road, you get hit by a truck, and get send home thanks ti your ID card).