even joke moves should do something... like taking of guard a oponent...Splash could boost a other moves, if you hop it could boost Bounce next turn with 1,5 power actually taking Magikarps limited movepool... wouldn't be that bad actually. Rock climb and all kind of jumping moves would then have a new found Splash combo...
But Splash does so something: it makes you want to have a better move on your Pokemon. Actually I always thought it would be funny if they made Splash into a move you can user in the overworld and there are just environmental objects here and there which if you use Splash on them you'll uncover a small secret location.
Not sure why hopping around pointlessly would increase the Power of "jumping" moves. Also don't think that would make Bounce any better, and Rock Climb isn't a jumping move.
Also, keep this in mind: not all moves are meant to be good. Many moves are made for RPG reasons: they're starting moves. At least when playing the main game, a low Level Pokemon isn't going to have powerful moves. Nah, they're just going to have the very basic skills any life form can do. They're not meant to be powerful or useful, their meant to show off what the Pokemon can do or add "flavor". And that's alright, because they're meant to encourage you to keep keep leveling up, keep looking forward to that next move that'll bring out the potential in your Pokemon. Or in Magikarp's case, make you really want to evolve it.
Also, sometimes a move that has little purpose while battling may be given a useful effect elsewhere. Splash had some pretty nice effects for Pokemon Contests and who can forget when powered by the Normal Z-Crystal that it gave a +3 Attack boost, lol.
Of course there are exceptions to this. Like, instead of focusing on Splash which is pretty much serving its intended, how about we talk about
Kinesis. THAT'S a move which needs support behind it. It's the signature move of Kadabra & Alakazam, powerful and popular Pokemon, has to do with psychic powers so sounds like it would have a pretty nifty effect... it only lowers the target's Accuracy by 1 stage. It's no better than Flash & Sand Attack! Infact, it was originally removed from Sword & Shield, but then later added back in with no changes done to it! Come on GF, I would think Kadabra and Alakazam showing off their psychic might to bend a spoon would be doing a little more than just making the opponent miss it.
what do you think about Life Dew should it work in rain like Synthesis in sun or react to other water moves used that turn or to whirlpool or aqua ring?
It anoys me that they introduce a move , create a cool dex entry but the moves dont relate with weather and other moves then when they actually should...
Yeah, I could see that, Rain increasing the healing property of Life Dew & Aqua Ring and the damage per turn of Whirlpool. That has context support.
... Huh, his post was deleted.
In that case I'll end off with saying this about potential other things GF can do: Sure they can. Infact, EVERY generation they do! Every generation brings in new Move/Ability/Item concepts, new Moves & Abilities that are copies of other but given different Type/context so other Pokemon can use it, and overall are finding ways to add new dynamics, depth, & dimension to the metagame. But at the same time there's also only so much they can do both mechanically as well as not overburdening both the system and the player (especially young players which is their demographic). And no matter how much we complain, the thing is GF really isn't listening to us. They have their own data and test studies done, and usually looking at different aspects of things. That doesn't mean we shouldn't complain of course, enough voices may bring something to GF's attention which they may agree "yeah, that should be done", but GF is an odd cookie (for better and for worse) so don't rely too much on that. You can point out problems you have with Pokemon/Moves/Abilities/Items/etc. and heck, even suggest things GF could have done... but remember that's really all you can do. It's nothing to get into an argument with someone else about. You made your point made, some people may have agreed, some disagree, but being I doubt anyone on GF even visit Smogon's forums it's just to move on. You said what you wanted to said, got it off your chest... AND if in the future GF does do an idea you suggested you can then brag about "calling it" (though perfectly know you just managed to guess what GF did, don't say GF copied what you because, HA, no).
Follow the rules, respect others, and most of all enjoy yourself and remember the 
. I want to battle everyone's full team of six.