Pokémon: Blue Version is part of the first generation of games within its famous series, known for having a very large number of beneficial glitches. In fact, the game can be completed in less than one minute of in-game time using save data corruption (as evidenced in the run of the Yellow Version), but this run avoids such techniques in favor of activating an entirely different glitch.
This is an improvement of 09:03.25 over the previous run in this category, which used a similar glitch to the more heavily glitched categories. You might want to check out the run that avoids glitched warps for an example of quickly completing the game without corrupting the memory.
It is recommended that you read the author's comments to fully enjoy what's being done here.