• Strange signal interference is causing pokeballs to malfunction up ahead (multiple potential consequences or reasons why this could suffice as a roadblock)
• A massive shipment went offroad up ahead causing a huge spillage of max repels, your pokemon are refusing to go forward
• Tough looking trainer wont let you pass unless you beat them in a battle, but they acknowledge you as a worthy opponent until xyz. (Upon battling gatekeeper you find they are comically weak as a play on the pointless roadblock in-joke)
• no visible roadblock but you hear a voice echo GO BACK, better do what it says (it's later hinted but never explicitly stated to be the Professor)
>>53728357This one is good