Erza and Captain America would be an amazing combination. Erza is a strong and disciplined warrior in Fairy Tail, and Captain America is the symbol of justice and leadership in the Avengers. Erza's various armors and combat skills combined with Captain America's shield and strategic thinking would make them a formidable team. They could lead the combined forces of Fairy Tail and the Avengers in battles against powerful foes, and also inspire the other characters with their unwavering determination.
I think Ben's Heatblast and Thor would be an interesting combination. Heatblast can generate intense heat and fire, while Thor has his lightning powers. They could create some really powerful elemental attacks together.
I think Spider - Man from the Avengers and Four Arms from Ben 10 would make an interesting combination. They both have enhanced strength and agility. They could have some really cool fight scenes together, and also some humorous exchanges. Four Arms' brute strength combined with Spider - Man's acrobatics would be a sight to see.
Definitely Gray. Their personalities are quite different. Gray is cool - headed and uses ice magic, while Wolverine is more of a rough - and - tumble fighter. The contrast in their powers and attitudes would lead to some great banter and interesting team - up moments.
Yugi and Natsu would be an interesting pairing. Yugi is calm and strategic, while Natsu is impulsive and powerful. They could balance each other out. Yugi could use his intelligence to plan their adventures, while Natsu could use his fire - based magic to fight off enemies. Another interesting pair could be Erza and Kaiba. Erza is a strong and disciplined warrior, and Kaiba is a proud and powerful Duelist. They could have some epic battles of wills and skills.
Spiderman and Erza would make for a strong pairing. Erza is a very powerful and disciplined mage. Spiderman could be in awe of her combat skills and leadership. They could fight side - side against powerful enemies, with Spiderman using his webs and agility and Erza with her various armors and weapons.
I think Kakashi and Gray would have some cool interactions. Gray's ice - magic and Kakashi's fire - based attacks (like Fireball Jutsu) could lead to some interesting battles or training sessions. Also, Kakashi and Lucy could be fun. Lucy's celestial spirit magic and Kakashi's summoning jutsu could be compared and contrasted. And of course, Kakashi and Makarov. The old and wise guild master could give Kakashi some unique insights about the Fairy Tail world, and Kakashi could share his ninja wisdom with Makarov.
I think Natsu and Ruby would be an interesting pairing. Natsu is all about brute force and his love for fighting, and Ruby has her own determination and speed. They could learn from each other's combat styles. Ruby could show Natsu how to be more strategic with his attacks, while Natsu could teach Ruby how to be more fearless in the face of danger.
Another interesting interaction would be between Deadpool and Gray. Gray is cool - headed (pun intended) and has his own unique fighting style with ice - make magic. Deadpool's chaotic fighting style would contrast greatly with Gray's. They could start off as rivals, with Deadpool constantly taunting Gray about his stripping habit, but then as they face a common enemy, they would have to learn to work together. This would lead to some great character development and some hilarious exchanges as Deadpool tries to understand Gray's magic and Gray tries to tolerate Deadpool's antics.
Gray and Sango might make for an exciting pair. Gray with his ice - make magic and Sango with her weaponry skills. Gray could create ice weapons and structures to assist Sango in battle, and Sango could show Gray some of the more traditional combat techniques. Their personalities are also quite different, with Gray being more laid - back (most of the time) and Sango being very determined and focused on her goals.
Definitely Spiderman and Natsu. Natsu's brash and fiery personality would contrast with Spiderman's more responsible and cautious nature. They could have some great banter while fighting side by side.