Bots that play only one opening/defence?

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Chessyesnaby
Hello I am new to chess and I was wondering if there are bots that only play one opening, or defence? I am hopeful that there are since this would help me to learn the lines, and how to play against the specific line associated to each opening/defence. I recognize that as soon as I would drop from theory they would move away as well but I cannot help to think this would help me.
Gymstar

I have no idea

jeremiah5262

The Ahmed bot (2200) almost always opens but moving his f pawn up two squares but idk about any other bots

BaconChess1200

The bot named Nelson(1300) will always play Wayward queen attack(1.e4 e5 2.Qh5) after 1.e4 e5

Ilampozhil25

setup the position in analysis board and click "play vs bot" and then click the sign that looks like a mini computer and switch the bot from maximum bot

TheCurious1357

Nelson

schchchch
When you play online mostly you play against cheaters who you bots. It haa therefore no use to play online.