"There was a small costume that you would hardly ever find in the garden."
- "There was a small costume that you would hardly ever find in the garden."
"there was ~" 「〜いた」
"a small costume" 「小さなキグルミ」
"~ that you would hardly ever find" 「めったに見る事の出来ない〜」
"in the garden" 「園には」
"There was a small costume in the garden that you would hardly ever find." も言えます。
There was a small mascot costume at the park that you can hardly ever find.
「園にはめったに見ることの出来ない小さなキグルミがいた」は、英語で「There was a small mascot costume at the park that you can hardly ever find.」と言います。「hardly ever find」は「めったに見つからない」という意味です。「mascot costume」は「キグルミ」を指します。
オーストラリア 
アメリカ合衆国 
