His invisibility power would be extremely useful for stealth missions in RWBY. He could easily sneak up on Grimm or gather intelligence without being detected.
Danny's ability to overshadow people or objects could have some interesting applications. In RWBY, he might be able to overshadow a Grimm and control it to some extent, or he could overshadow a vehicle to make it move without a driver. His ecto - blasts could also be a powerful weapon against Grimm, especially if they are made of some sort of energy that the Grimm are vulnerable to.
Well, Danny can go intangible, which means he could pass through solid objects. Spiderman could use this to his advantage. For example, if they are in a building surrounded by bad guys, Danny could phase through the walls and open doors from the inside for Spiderman to enter unnoticed. Also, Danny's flight ability combined with Spiderman's web - slinging could create a very unique form of transportation for them. They could quickly move across the city, with Danny flying and Spiderman swinging from Danny's body using his webs.
Danny's powers could be a huge asset. His intangibility could help him and Batman get into places that are otherwise inaccessible. His flight would give them an edge in chasing villains across rooftops. Also, his ghostly energy blasts could be used as a new form of weapon against the bad guys in Gotham.
His ghostly wail, a very powerful attack, could be used as a last - resort weapon against powerful foes in the Batman universe. However, it also might attract unwanted attention from other supernatural entities. Danny would have to learn to control it better in the more urban and populated Gotham. This would add an interesting dynamic to the crime - fighting in Gotham as they would have to deal with the potential consequences of using such a powerful ability.
His intangibility power would be very useful. He could pass through obstacles in the Pokemon world like thick forests or locked doors in old Pokemon ruins. This would give him access to places other trainers can't reach. His flight ability would also be great for scouting areas for rare Pokemon or for getting a better view during battles.
His powers could become more ice - based. Instead of the normal greenish - blue energy, his blasts might turn a frosty white. His ability to fly could also be affected, with a cold trail following him as he moves through the air.
Some fanfictions might explore Danny's powers by giving him new abilities related to his existing ones. For instance, his invisibility power could be enhanced to also make other objects or people invisible when he touches them.
His invisibility would be great for stealth operations. He could gather intel without being detected.
Well, in certain fanfictions, Danny's power of flight could be revealed to be much more than just floating in the air. It could be related to his emotional state. For example, when he's extremely determined or angry, his flight becomes faster and more powerful. This shows that his powers are not only physical but also tied to his emotions.
Well, often in fanfiction, Danny's powers evolve as he faces more powerful enemies. The need to defeat a stronger foe forces him to adapt and his powers change accordingly. For instance, he might develop the ability to phase through not just solid objects but also energy barriers. His ghostly wail, which was already a powerful weapon, could become more focused and destructive. Also, when he teams up with other powerful characters, their combined energies or knowledge can lead to his power evolution. They might teach him new ways to use his powers or unlock hidden potential within him. His power evolution in fanfiction is really diverse and depends on many different factors.
Danny could use his ice powers to create ice shields during battles. This would give him an extra layer of protection against his enemies' attacks.