So right now, without any outside guide, it's almost impossible to tell on your own if you have all of the battle challengers unlocked. it would be nice if each one showed up on the challenger page, but the ones you haven't unlocked yet, perhaps show them with a lock icon over the top. For ones that require an item to unlock, maybe have a link to the shop search of the item that unlocks it. For the "secret" tab, maybe show a message that says "discover this challenger in the world of Subeta!" when you hover over the lock icon. I think this could be a good way for people to see what challengers they still need and get a few more people to purchase challengers from the cash shop and MC. This is only really important for the "secret" and the "cash shop" tabs, because Normal are all unlocked, "event" and "throwback" are only around during events for a limited time. "Super" goes either way, it could show up, it could not show up for everyone, I don't care.
I made it, probably needs clarified or explained better, but I made it.
[edit]

mock up done by
Hurray! :D
I fully support this. It can be really difficult to keep track of which challengers you're missing, especially if they're retired CS challengers or are unlocked by using a note or a pumpkin or something. Not having to keep track yourself and having an easily-accessible reminder would almost certainly get more MC or CSC challengers purchased!
Showing where the missing challengers would slot in should incentivise newer battlers to buy the easier challengers, as they would otherwise be unlikely to bother working out what challengers they're missing.
I really like this idea. I'm 99% sure I have every challenger but I'd love this to be implemented for people getting started or getting back in the game. It's very easy to miss challengers if you take a break from Subeta, miss a few weeks, etc.
This idea stems from the account search for CS challengers thread in response to
I came up with the idea when going through my challenger list comparing the ones she had with the ones I have unlocked to say which she needed (if anyone else wants me to check if they are missing any, let me know)
just an idea I came up with which seems like it could be done, probably with a rewrite of the page. it's probably fairly low priority, but it would be a nice change.
This would be a great solution to the problem in my thread. If it's not possible to make account search show challengers from CS items, this would totally work. A hell of a lot easier to implement too, I'm sure.
If locked challengers show faded out on the page, and tell you how to unlock them, it would be easy to see who you're missing, and how to find them.
I like this idea! maybe instead of a lock or with the lock, the image of the challenger can be faded?
I was thinking about like a lock with it looking greyed out or faded underneath. I doubt I could make a mock up that wouldn't look horrible though
so like the image of the opponent greyed out with a big lock in the center?
Yeah something like that, with the name clearly visible though
so this is awesome, probably I have at least 1 secret challenger that I need..
I would really like this too! I'm pretty sure I've got everyone available right now, but it's such a pain to check.
Support for this! It would be really helpful to see which challengers I don't have, so that I can quickly find how to get them, instead of having to constantly check if there ARE any I'm missing!

So much yes for this, I know a lot of users who are busy with RL for a bit struggle to catch up when they come back. Also alternatively maybe a greyed out challenger photo or something can work as well (visually speaking)
2025 Stalacbite, Focused (7)

Like this?

yeah something like that, that looks a lot better than what I could have done. then maybe on hover it says like this challenger is unlocked with this item! and it displays the correct item and a link to the shop search or something.
Yes please. I know I stupidly skipped out on a lot of CS challengers when I was weaker, but now that my pet is growing, I'd like to get the ones I can beat and slowly make my way up. I honestly have no idea what I'm missing, I just know it's a lot. This would be really helpful, because it would show them in their place, from easy on up.