Completing whoisthisgit's Very Stupid Fire Emblem Challenge

I have been a long time fan of whoisthisgit. I first came accross his channel sometime around 2008 or so, when he was famous for various Sonic challenge videos and Tails abuse series. Thanks to his videos, I've also gotten into games such as Fire Emblem, Clock Tower and so on. One day, I came accross his "Very Stupid Fire Emblem Challenge", which is about maxing out Barth's resistance stat through natural means (aka leveling up) and without the use of stat boosters. I was wondering if there was anyone who has actually completed the challenge, but no matter how hard I searched, I couldn’t find anything regarding that, so I took it upon myself and decided to complete the challenge. It is by far the hardest RNG challenge I’ve ever done, as Barth is more likely to level both speed and luck simultaneously than get a single point of resistance. Hope you’ll all enjoy watching Barth’s epic battles and him getting resistance points left and right.

Edit: For those wondering how did I complete this challenge, I used save states to undo bad arena fights and levels, and skipped turns to advance RNG to retry the arena fights to get the desired resistance level ups. This technically isn't RNG abuse, but it's not something that's possible on the real hardware. Even with this method, it took me a very long time to do this. I will not answer this question in the comments anymore, so please refer to this description.