Fire Emblem 6: Using status staves against Idunn
Channel: Flametix
Date: 2022-10-03

This video shows off some different things you can do with status staves in the final chapter of FE6, with Idunn and her reinforcements being vulnerable to them unlike other GBA final bosses. It was pretty interesting to see that it was possible and what you could do here, even if not practical. 
Captions are available for some commentary.

I got this original FE6 save from GeneralHorace's post with many GBA saves. 
https://www.reddit.com/r/fireemblem/comments/3o17gb/anyone_got_some_game_saves_for_me_fe678/

0:00 Sleep 
0:50 Silence
1:30 Berserking a War Dragon reinforcement
2:20 Berserked War Dragon vs Idunn with animations
2:46 Berserked War Dragon kills Idunn (glitchy)
3:45 Preparation to move Idunn
5:35 Actually baiting Idunn onto the stairs
6:20 Berserking Idunn
6:50 Berserked Idunn dying with map animations
(Poison is cheat-only.)
7:10 Idunn dies to poison, Roy dies and causes a game over
7:56 Idunn dies to poison, war dragon moves and ends chapter
8:14 Idunn kill with Silence effect 
8:35 Idunn kill with Sleep effect
8:40 Idunn kill with Berserk effect 
8:45 Idunn kill with Poison effect