I'm asking for the name of a cartoon

He had seen it on CCTV6 about six or seven years ago. It was probably a European-American anime. There were three main characters. They fought in the water, land, and air regions respectively. Each of them had three sets of equipment. They used level one equipment for small things, and then the level of the equipment would increase according to the difficulty of the matter.
The reason why I have a deep impression of this animation is because it is very realistic, but I forgot the name, I hope someone remembers...

Answer 1

One of them was called My Neighbor Totoro. It was a manga created by the Japanese manga artist Ishii Sui, and it was released in 1986. The story tells the daily story of a young detective named Ken Orochi and his neighbors. This cartoon was very popular not only in Japan, but also in China, Korea and other places with many fans.