Pikachu gone for 4 hours

ok so Pikachu got out when the maid open the door for the parcel guy. Sukhumvit soi near the BTS, lots of cars. We look for 4 hours, I cried a bit. Ran around the soi with the lost dog poster and my little brother was looking in the drains. Nothing. Then a guy from the Facebook group message me, he said the guard at his shop saw a small dog near the soi back gate. We went and Pikachu was just sitting there at the gate like nothing happened. He is 1 and half years and still very small so i think people think he is a toy. Now the gate is closed always and i put a tag with my number and LINE on his collar. My mum says she want a GPS but that is too expensive for now.