Apparently it's not common knowledge that you can cut tall grass.

[BungiePhantom]

It also wasn't common knowledge the Oak gives you 5 pokeballs if you talk to him after the second rival battle west of Viridian city. Also you can go to the safari zone for free in Yellow but it required you to be broke

shameless video advertisement showing these
Prof. Oak text error - YouTube
Safari zone discount followed by free entry - YouTube

[jae]

Prof. Oak text error - YouTube
Safari zone discount followed by free entry - YouTube

wat
didnt know about those, either
what have i been missing out on