Just starting out in this game (haven't played it in years), and I had a few questions about the start of the WR run.

1. Why use the default name instead of say "a"? With the number of times the MC's name is said, how much time can be shaved off with the quicker text pop as a result?
2. Why the Vaccine starter specifically as opposed to Data or Virus? Is there a specific advantage in speedrunning using it?
3. You mention RNG manipulation using savestates, can you expand on that? What applications could it have on an actual run where savestates are banned?
4. In the third mission, you bypass the floor gate and make a beeline for ToyAgumon to trade. How important to the run is SnowAgumon?

1. Text scrolls so fast in this game that it doesn't matter. You will lose more frames deleting letters than if you just pressed Start and selected OK.
2. Vaccine is faster. Plus it takes less presses of the D-Pad to get to Gold Hawk than the other Guard Teams.
3. Not going to answer that one, as the game is best run on console. Savestate manipulation is for practice only.
4. SnowAgumon is important to the run. He is very powerful for that point in the game and easy to obtain for how powerful he is. Otherwise, you would have to spend a ridiculous amount of money on items to recruit a more advanced Digimon.

You should check out my guide. It is very thorough and will help you through the game.