1. Beyblade burst chouzetsu episode 50
This episode has it all great BGM, voice acting, build up, tension, visuals, storyboarding, drama, and animation. So With the battle of aiga vs phi was being started here they amplify the tension and stakes by making the surroundings character comments on the battle and not to mention aiga POV on this which phi in his head is like scaring the hell out of him, this here is a great example of building up climax battle by putting sublte details into the surroundings and the character itself. And yes as you've expect when the battle starts you could see all of that in build up pay off.
This final part right here is
"CINEMA" you could just feel the tension that aiga has here and the color being used here not to mention the great voice acting by Tomoko Ikeda here just makes the scene more perfect IMO.
2. Beyblade burst Gatchi episode 49
This to me was second in line to becoming the best animated episode it just that the build up to this battle was kinda alright and there wasn't that many drama in this episode which makes it less tense and exciting but with that said this epsode is still freaking good. This episode tackles with so many cool effects that it makes the overall visual very appealing even so that my no.1 pick.
3. Beyblade burst Sparking episode 52
Directed by the legendary Ueda, Sparking her final power into this episode. Jokes aside this episode is by all mean is a freaking amazing episode Ueda has always make the episode that her handle feels alive and full of emotions freaking lean got a personality. Tho with that said this episode still have its issues such as the second battle feel a bit drag on and some drawings looks odd but none the less a still a great episode.
4. Beyblade burst Sparking episode 25
Coming in at no.4 we got another episode directed by Ueda and like i said before this episode excel in conveying an emotion which the prime example is when Hikaru turns into super saiyan blue. Tho this episode doesn't have that fancy CGI Beys effect which makes me lower the placement of this.
5. Beybalde burst DB episode 52
So yeah this episode is overall imo is a bit weak it doesn't have the proper build up like the other episode have but with that said this episode is still pretty good. They tackle with a lot of visual changes here and when that second half of the battle starts it feels like areal fierce battle with belial and raphael slaming each other acompanny with the brilliant use of camera work makes it all worth to watch.
Honorable mentions
Beyblade burst god episode 51, this episode almost got the no.5 spot but the second battle imo feels a bit too rushed and the animation also doesn't stack up to DB ep 52 imo.
Beyblade Burst Sparking episode 31, so for the first half of the episode we got probably one of the most jam pack battle but the second half animation doesn't quite live up to it.
Beyblade burst Gatchi episode 36, this episode almost made it into the list but then i rewatch the episode and find some parts looking odd.