Ok, so this was a mecha anime. It was a series. The main story is that there was a boy who, along with his robots (I think they belong to him, also I think some of them were created by his grandpa ) are trying to win some kind of robot world championship. I just remember some scenes, which I am describing below
There is one scene where the boy's grandpa says that he left a sticker inside every robot he created, then one of the robots exclaims "huh! So that sticker is inside me also ?"
In one of the fights, one of the opponent's robots has a cobweb inside, due to which it cant function properly.
Then there is one scene where they go to train, and one of the robots was cutting wood, but the way he was cutting was curious, that he simply tapped the wood and it was cut perfectly (sides were smooth)
The main female character goes to another team, where she is assigned to work on only a limb of the robot. She quits saying that her team is the best( the main character's team ) and that she is returning to it
Please help me find this anime. Really important part of my childhood.