questions

I have seen that it is possible to make the boots so weak that they do not do any damage at all when you attack them, how do you do this? it is a great advantage when you want to help someone increase their lvl

Fight with no kudos (don't repair) for a long time until you have 0% durability

Their boots? Actually you can get 0 damage weapons and 0 defense armor. How? First, get 0 kudos or a very low amount, like less than 1,000 depending on your level. 0 is best. You can donate to your treasury or attack a high level bot to get rid of your kudos until you have little left. Next step is just to attack other bots. Feel free to attack whores or if the bot you have is a whore already just lose a lot to higher levels. Just keep doing it until your repair costs get high. Check the showroom and check the condition of your bot's weapons and armors. If it's at 0%, then it's completely broken and will provide no attack power/defense.

And that's how it's done. If you want to get your weapons back in fighting condition I'd suggest keeping a good weapon in the stash and then switching. Then get some kudos to cover your repair cost and bam you're repaired.