[Mr. K]

“Pleaded” guilty is correct. There is no such word as ‘pled’, despite its constant misuse over the last couple of decades.

At least I think that’s right.

[Mr. Lucky]

Merriam-Webster considers pled to be a standard English word.

I would have responded to your post sooner, but a cut my finger and bleeded all over my cell phone.

[John Leland 1789]

pled /pled/

verb

North American, Scottish, or dialect past and past participle of plead.

[traderrob6]

Interesting. I think I have heard it used over the years so often that it has become ingrained in my mind as being proper.

[TigersEye]

In the 1960s pled was the only word used in newspaper articles. It’s in the dictionary.

verb
a simple past tense and past participle of plead.