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Here is the sentence including the word. It is said by an old man who is
cooking some food and planning to give it to a younger person who is in jail.

> ようし わしゃあ **やったる** ぜ

I am not sure if it is a shorten form of 「やってやる」which means "Doing something
for someone who is below than the speaker"

Is it still used nowadays in Kantou area?
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2016-07-18T04:12:25.233
36744
2023-02-27T01:55:27.357
2023-02-27T01:55:27.357
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question
manga dialects contractions subsidiary-verbs
What does the word 「やったる」 mean?
Yes, it's short for やってやる. Please see [this
answer](https://japanese.stackexchange.com/a/18159/5010) for the list of
similar contractions. I think this contraction is common throughout Japan
regardless of generation (but it sounds relatively masculine)

And `te-form + やる` means not only "to do something for someone" but also "dare
to do something", "to do something proactively with an active effort", "to do
something and show off (the result / one's power)" etc. See: [what does てやる
mean when it is not used for
giving?](https://japanese.stackexchange.com/q/14413/5010)

The sentence probably just means "I'll do that" (without "for someone").
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2016-07-18T04:26:18.057
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2019-09-26T09:11:07.653
2019-09-26T09:11:07.653
5010
5010
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answer