Please can anyone tell me ALL the episodes Haibara is in? I am Haibara's biggest fan!

All Haibara episodes from 129 up to now (I'm not sure if it's complete):

Episode 129
Episodes 130-131
Episode 135
Episodes 136-137
Episodes 138-139
Episode 140
Episodes 146-147
Episodes 156-157
Episode 174
Episodes 176-177-178
Episode 182
Episodes 188-189-190-191-192-193
Episodes 194-195
Episodes 205-206
Episodes 212-213
Episode 225
Episodes 230-231
Episodes 233-234
Episode 242
Episodes 246-247
Episodes 258-259
Episodes 269-270
Episode 276
Episode 277
Episodes 279-280
Episodes 289-290
Episodes 294-295
Episodes 301-302
Episode 304
Episodes 309-310-311
Episodes 312-313
Episodes 329-330
Episodes 335-336
Episodes 338-339
Episodes 340-341
Episode 343
Episode 345
Episodes 346-347
Episodes 348-349
Episodes 358-359
Episodes 366-367
Episode 373
Episodes 374-375
Episode 376
Episode 381
Episodes 390-391
Episodes 394-395-396
Episode 398
Episodes 401-402
Episodes 403-404
Episodes 411-412
Episode 414
Episode 418
Episodes 421-422
Episode 423
Episode 425
Episodes 427-428
Episodes 435-436
Episodes 443-444
Episode 453
Episodes 454-455
Episode 460
Episodes 466-467
Episode 468
Episodes 472-473
Episodes 476-477
Episode 478
Episodes 481-482
Episodes 484-485
Episode 486
Episode 488
Episode 492
Episode 495
Episode 497
Episodes 501-502
Episode 504
Episode 507
Episode 509
Episode 511
Episodes 518-519
Episode 521
Episode 523
Episodes 524-525
Episode 535
Episode 536
Episodes 542-543

I think it's episode 347

Here is a link to all the episodes, OVAs and movies she is in: link
Of course she's in quite a lot because of Detective Boys :)
Hope this helped ^^

You can go to detective conan wiki and search "Ai Haibara's appearances