Has shadow ever used Time Stop in IDW? It’s only implied he can use it because of Sonic Forces
Given the file, no he has never used it.
People also seem to forget the howitzer impact is a two kilometer wide explosion over 5x shadow’s durability. And Cluster, an attack which we saw him use in the War against High Ends, (which we’ve seen to include a lot of explosions, I don’t know if I’m just reading wrong, but cluster seems to include the explosions he throws out during his Rush down of the high ends) are OVER the ap of Howitzer impact. I.E Cluster>>PLW Howitzer>EA Howizter=66.57 Kilotons. Cluster by itself is likely to just one tap Shadow. And yeah a spin dash likely could gore him, and it has happened before? Not in the, furry buzz saw of death comes right at you way, but we saw in the Serpenters fight that their quirk tore through him and his response was to keep fighting harder.
Stun Grenade could blind shadow for a flurry of explosions. His gauntlets store up his sweat for explosions that are confirmed to be many times stronger then his normal ones (I.E Base Deku in UA Beginnings could take Bakugou’s normal explosions, but the gauntlets explosions are out right stated to be able to one tap him if he gets nicked by it). He has his own pocket grenades which he can use for set ups, auto cannon or auto machine gun, explosions that while slightly weaker to his normal ones, are still going to be chewing through Shadow’s stamina and durability.
Bakugou isn’t as experienced sure, but shadow’s style of either hit and run with the spin dash, or throwing chaos spears isn’t new to him. In fact stuff like that is quite common in the MHA world, hell he literally trained under The number two hero who used danmaku styled attacks with spears, and has shown to be able to tag people who can avoid these danmaku. While I haven’t read the IDW comics, I don’t think someone who fights by jetting themselves with explosions the can negate durability on each hit is as common as fighters like Sonic or shadow. Also, his damage boosts. Over time he’s simply going to get stronger as he sweats more, which means that if he uses the Howizter or Cluster in this state it’s going to be Boosted Cluster>Cluster>>Boosted PLW Howitzer>PLW Howizter>>EA Howizter=66.57 Kilotons.
I won’t say that shadow can’t win. He likely could, his teleportation and better AP mean he’s going to kick down Bakugou faster and can get around Bakugou’s superior aerial maneuverability against his hover boots. He has much more experience than Bakugou and likely much more skill that can lead him to victory. I personally just see the 66.57 Kiloton and over Nuke’s being more viable a win con then a much more drawn out fight.