While he was a guest of Cloud Nine, Kurt’s costume was damaged. One of the Warpies, by the name of Silkworm, designed a new one for him. It was very close to the original one but also had some new elements. [Excalibur #63]
Apparently, Kurt was more comfortable with his classic look, which is why he returned to it only a short time later. [Excalibur #70]
A few weeks later, Kurt decided for a much more abrupt change. He grew a goatie, had a new haircut and his new outfit went along with his love for swashbuckling and pirate movies. [Excalibur #96, 98]
When Excalibur disbanded and Nightcrawler returned to the X-Men, he again wore the classic outfit from the days while he was a mainstay of the team. [Uncanny X-Men #360]
In the following months, Nightcrawler decided to become a priest in training and help out the X-Men only in emergency situations. In his absence, the mutants had adopted some sort of team look. Each costume had a big X across the chest area and Nightcrawler’s had shoulder pads similar to Colossus’. Otherwise, the suits were still individual and came in different colors. [X-Men (2nd series) #104-105] Kurt’s uniform had two versions in different color schemes. The one presented her has a red X on a blue bodysuit. The other version was dark red with a white X on it.
Let's try another one...
How about.. PSYLOCKE
In early stories, Betsy Braddock had nothing representing a costume. She might have worn some standard military clothes while training with STRIKE, the British version of SHIELD, but much of that time is still shrouded in mystery.
During a time that her twin brother, Brian, was touring the world, Betsy was talked into assuming the mantle of Captain Britain, wearing a modified suit of an alternate Kaptain Briton, who had tried to rape her only several weeks before. The helmet included a wig with red, white and blue streaks of hair. [Captain Britain (2nd series) #12-13]
Check it out.
After emerging amnesiac from the Siege Perilous, Psylocke’s body was switched with that of the Asian martial artist, Kwannon. Brainwashed into believing herself to be the Hand’s prime assassin, Lady Mandarin, she wore these two suits. The more formal attire and the other one as basic costume for her missions. Even after she was freed from illusion, Betsy kept wearing the ninja outfit since, now able to protect herself, she no longer needed any body armor. [Uncanny X-Men #256-258]
(with 2 pics)
When the X-Men reunited after the events of the X-Tinction Agenda, they tried out wearing the basic X-uniforms to give them a team feeling. For several members, including Psylocke, it was the first time to wear these standard suits. [Uncanny X-Men #273]
With the original five rejoining and the X-Men dividing into two strikeforces, the group returned to wearing individual uniforms. Betsy returned to her ninja looks and wore them for quite a long time. [X-Men (2nd series) #1]